化学专业专业英语论文
化工专业科技英语作文
化工专业科技英语作文Chemical Engineering and Technology。
Chemical engineering and technology is a branch of engineering that applies physical sciences (e.g., chemistry and physics) and life sciences (e.g., biology, microbiology and biochemistry) together with mathematics and economics to produce, transform, transport, and properly use chemicals, materials and energy. It essentially deals with the design, construction, and operation of machines and plants that perform chemical reactions to solve practical problems or make useful products. It is a multidisciplinary field that involves a wide range of industries, from pharmaceuticals and food to petrochemicals and energy.Chemical engineers are involved in many aspects ofplant design and operation, including safety and hazard assessments, process design and analysis, control engineering, chemical reaction engineering, construction specification, and operating instructions. They are alsoresponsible for the development of new materials and technologies, such as nanotechnology, fuel cells and biomedical engineering. In addition, they play a key rolein environmental protection and the development of sustainable processes and products.Chemical engineering and technology is a rapidly growing field with great potential for future development. As the demand for energy and materials continues to increase, the need for chemical engineers will also grow. In addition, the increasing focus on environmental sustainability and the development of new technologies will create new opportunities for chemical engineers to make a significant impact on society.One of the key challenges facing chemical engineers today is the need to develop sustainable processes and products. With the increasing awareness of environmental issues and the finite nature of natural resources, there is a growing demand for processes and products that minimize waste, reduce energy consumption, and use renewable resources. Chemical engineers are at the forefront of thiseffort, developing new technologies and processes that are more sustainable and environmentally friendly.Another challenge facing chemical engineers is the need to develop new materials and technologies to meet the demands of a rapidly changing world. As new industries and technologies emerge, there is a growing need for new materials and processes that can meet the demands of these industries. Chemical engineers are working to develop new materials and technologies that can meet the needs of these industries, such as advanced materials for electronics, new materials for energy storage, and new processes for the production of biofuels.In conclusion, chemical engineering and technology is a dynamic and rapidly growing field with great potential for future development. Chemical engineers play a key role in the development of new materials and technologies, the design and operation of chemical processes, and the development of sustainable processes and products. With the increasing demand for energy and materials, and the growingfocus on environmental sustainability, the need for chemical engineers will continue to grow in the future.。
化学专业英文作文
化学专业英文作文Studying chemistry is like entering a whole new world. It's all about atoms, molecules, reactions, and the amazing things they can create. It's like magic, but withscientific explanations.Chemistry experiments are both exciting and nerve-wracking. You never know what will happen when you mix different chemicals together. It's a bit like playing with fire, but in a controlled and safe environment.The periodic table is like a map of the chemical world. It's full of elements, each with its own unique properties and behaviors. Learning about each element feels like getting to know a new friend, with its own quirks and characteristics.Lab reports are a big part of studying chemistry.They're like telling a story, but with data and observations instead of characters and plot. It's all aboutdocumenting what happened in an experiment and what it means in the bigger picture of chemistry.Chemistry equations can be intimidating at first, but once you understand the rules, they start to make sense.It's like solving a puzzle, trying to balance the elements on both sides of the equation to make everything work out perfectly.Organic chemistry is like learning a new language. It's full of complex structures and reactions, and it takes time and practice to become fluent in it. But once you do, it opens up a whole new world of possibilities in the field of chemistry.In the end, studying chemistry is all about curiosity and discovery. It's about asking questions, conducting experiments, and uncovering the secrets of the chemical world. It's a journey of constant learning and exploration, and it never fails to amaze and inspire.。
化学专业英语毕业论文
化学专业英语毕业论文关键词：化学工程专业英语教学方法能力培养摘要:在化学工程专业英语的教学中,结合专业英语的特点,改革教学方法,创造良好的环境,充分调动学生的兴趣和主动性,通过实践培养和提高学生用英语获取专业信息和交流的能力。
我国的大学专业英语教学是大学基础英语的后续阶段,其目的是为了帮助学生较快地掌握、运用专业英语,把语言能力同专业知识融为一体。
21世纪是国际化的世纪,如何应对国际化的挑战,培养一大批既具有丰富的专业知识又有很强的英语能力的高水平的创新人才是我们面临的一大挑战。
英语正成为一种真正的世界语,据统计,讲英语、学英语的人多达世界人口的五分之二,世界上有85%的科技资料用英语出版,国际学术会议的工作语言一般都是英语。
本文试从如何激发学生的兴趣,科技英语及化学工程专业英语的特点以及教学方法的改进等方面来谈一谈化学工程专业英语的教学体会。
一、激发学生的兴趣兴趣是最好的老师,是学业成功最重要的心理动力一个人的潜能能否充分发挥出来很大程度上取决于他是否有稳定的兴趣。
学校的课程及各种教学安排要尽可能地激发学生学习的兴趣,养成学习的习惯,熟悉学习的方法。
在给学生用英语讲授第一次课时,笔者试图从五个方面激发学生学好专业英语这门课程的兴趣和紧迫感。
首先,让学生了解中国化学工业和世界化学工业的状况,中国化学工业在深化改革中发展,在困难中前进并取得了显著的成绩,但是与世界发达国家相比还有一定的差距,在技术方面还远远落后于发达国家,需要向他们学习先进的技术和经验。
21世纪的中国化学工业充满希望和机遇,也充满竞争和挑战。
作为未来的化工工程师,为顺应时代发展的潮流,也同样面临着机遇和挑战。
第二,让学生了解化工工程师由于在科学和工程学方面有着广泛的知识和技能背景,可以胜任许多部门的工作。
正因为此,化工工程师的薪水是比较高的,从表1美国1999年各类工程师的年薪可以看到本科毕业的化工工程师的薪水比其他各类本科毕业的工程师的薪水要高。
化学师范专业介绍英语作文
化学师范专业介绍英语作文Title: Introduction to Chemistry Education Major。
Chemistry education is a specialized field that prepares individuals to teach chemistry at various educational levels, ranging from middle school to college. This major equips students with a deep understanding of chemistry concepts and pedagogical techniques necessary for effective teaching. In this essay, we will delve into the components, importance, and career prospects of a chemistry education major.1. Core Curriculum:The curriculum of a chemistry education major typically encompasses a comprehensive study of chemistry alongside courses in education theory and practice. Students undertake foundational courses in general chemistry, organic chemistry, physical chemistry, and analytical chemistry. These courses provide a solid grounding in theprinciples and applications of chemistry, which isessential for effective teaching.Additionally, students engage in education-focused courses that cover topics such as curriculum development, classroom management, educational psychology, and teaching methodologies. These courses are designed to equip future educators with the skills and knowledge needed to create engaging lesson plans, assess student learning, and foster a conducive learning environment.2. Importance:Chemistry education plays a crucial role in cultivating scientific literacy and fostering interest in the natural sciences among students. By imparting knowledge of fundamental chemical concepts and phenomena, chemistry educators help students develop critical thinking skills and scientific inquiry abilities. Moreover, a strong foundation in chemistry is essential for understanding various real-world issues, such as environmental sustainability, energy production, and healthcare.Furthermore, chemistry education contributes to the development of a skilled workforce in science, technology, engineering, and mathematics (STEM) fields. By inspiring students to pursue careers in chemistry and related disciplines, educators play a key role in addressing societal challenges and driving innovation.3. Career Prospects:Graduates of chemistry education programs are well-equipped for a variety of career paths in education and related fields. Many pursue teaching positions at middle schools, high schools, and community colleges, where they educate students on the principles of chemistry and inspire a passion for science.Others may choose to work in informal education settings, such as museums, science centers, or outreach programs, where they engage the public in hands-on science activities and demonstrations. Additionally, some graduates may opt for roles in educational administration, curriculumdevelopment, or science policy, where they can influence educational practices and policies on a broader scale.Overall, a degree in chemistry education opens up diverse career opportunities for individuals passionate about both chemistry and teaching, allowing them to make a meaningful impact on the lives of students and society as a whole.In conclusion, a chemistry education major provides students with the knowledge, skills, and experiences necessary to become effective chemistry educators. By combining a deep understanding of chemistry with pedagogical expertise, graduates of this program play a vital role in promoting scientific literacy, fostering interest in the natural sciences, and preparing the next generation of scientists and innovators.。
关于化学的专业英语小作文
关于化学的专业英语小作文Chemistry is a fascinating science that delves into the composition and properties of matter. It is the study of how elements interact and transform, revealing the secrets of the universe at a molecular level.In the realm of chemistry, the periodic table stands as a testament to the systematic organization of elements. Each element has its unique atomic structure, and understanding these structures is key to predicting reactions and behaviors.Experimentation is at the heart of chemistry. It is through the meticulous design and execution of experimentsthat we uncover new compounds, reactions, and insights intothe world of matter. The lab is a place of discovery, where hypotheses are tested and knowledge is expanded.Chemical reactions are the cornerstone of this science. They can be simple or complex, exothermic or endothermic. The balance of reactants and products, governed by the law of conservation of mass, is a fundamental principle that guides our understanding.Analytical chemistry is the branch that focuses on the detection, identification, and quantification of chemical substances. It plays a crucial role in various industries,from pharmaceuticals to environmental monitoring, ensuring safety and quality.Organic chemistry, a sub-discipline, deals with carbon-containing compounds. The complexity of organic molecules and their vast array of reactions make it a rich field for innovation and the development of new materials and drugs.Biochemistry, another branch, explores the chemical processes within living organisms. It is the intersection of biology and chemistry, where the understanding of enzymes, proteins, and metabolic pathways is crucial for advancements in medicine and nutrition.Chemistry education is vital for nurturing the next generation of scientists. It equips students with the analytical skills and knowledge base necessary to contribute to scientific research and technological innovation.In conclusion, chemistry is an ever-evolving field with applications that touch every aspect of our lives. From the medicines we take to the materials we use, the study of chemistry is integral to the progress of human civilization.。
化工专业英语写作范文
化工专业英语写作范文Title: The Evolution and Importance of Chemical Engineering: A Global Perspective.Chemical engineering, often referred to as the "mother of all engineering disciplines," has played a pivotal role in the advancement of technology and industrialization. Its impact is felt across multiple sectors, including energy, healthcare, environmental protection, and more. In this article, we delve into the evolution of chemical engineering, its current significance, and its future prospects.Evolution of Chemical Engineering.The roots of chemical engineering can be traced back to the Industrial Revolution, when the need for efficient and sustainable production methods arose. Initially, the field was primarily focused on the optimization of processes in the chemical industry, such as the production offertilizers and dyes. However, as technology advanced, the scope of chemical engineering broadened to include areas like biochemistry, environmental engineering, and nanotechnology.One of the most significant milestones in the evolution of chemical engineering was the development of the principles of reaction engineering in the early 20th century. This marked a shift from a reliance on empirical methods to a more rigorous and systematic approach, based on the principles of physics and chemistry. This development laid the foundation for the design and optimization of chemical reactors, which are crucial in the production of various chemicals.Another key development was the integration of computers into chemical engineering in the later part of the 20th century. This integration enabled engineers to model and simulate complex chemical processes, thus predicting their behavior more accurately. Computer-aided design (CAD) and computer-aided manufacturing (CAM) tools also revolutionized the design and fabrication of chemicalplants, making the process more efficient and cost-effective.Current Significance of Chemical Engineering.Today, chemical engineering is at the forefront of addressing many of the world's most pressing challenges. For instance, it plays a crucial role in the development of sustainable energy solutions. Chemical engineers are involved in the research and development of efficient solar cells, batteries, and fuel cells, as well as in the optimization of biofuel production processes.In healthcare, chemical engineering has madesignificant contributions to the development of drugs and therapies. By manipulating molecules at the nanoscale, engineers are able to create targeted drugs that are more effective and have fewer side effects. They are also involved in the design of medical devices and the optimization of bioprocessing techniques for tissue engineering and regenerative medicine.Moreover, chemical engineering is essential in addressing environmental challenges. Engineers are working to develop more efficient waste treatment and recycling methods, as well as to mitigate the impact of industrial processes on the environment. They are also involved in the research and development of sustainable materials that can replace traditional, environmentally harmful ones.Future Prospects of Chemical Engineering.The future of chemical engineering looks bright, with numerous opportunities for innovation and growth. One area that is expected to witness significant advancements is biotechnology. With the advent of synthetic biology and genome editing tools like CRISPR-Cas9, chemical engineers will be able to design and engineer cells and organisms with enhanced functionalities. This could lead to the development of novel bioproducts, such as bioplastics and biofuels, that are more sustainable and environmentally friendly.Another area of potential growth is nanotechnology.Chemical engineers are exploring the use of nanomaterialsin various applications, including drug delivery, energy storage, and environmental remediation. The uniqueproperties of nanomaterials, such as their large surface area and enhanced reactivity, make them ideal foraddressing many of the challenges faced by the chemical industry.Lastly, the integration of digital technologies, suchas artificial intelligence (AI) and the Internet of Things (IoT), is expected to transform chemical engineering. These technologies can be used to optimize processes in real-time, predict and prevent failures, and improve safety and sustainability. By leveraging the power of data analytics and predictive modeling, chemical engineers will be able to make more informed decisions and develop more efficient and cost-effective processes.In conclusion, chemical engineering has come a long way since its inception and continues to play a pivotal role in addressing the world's most pressing challenges. As we look to the future, it is exciting to imagine the innovativesolutions that chemical engineers will develop and the impact they will have on society.。
有关化学专业的英语作文
有关化学专业的英语作文Studying chemistry is such a fascinating journey! I'm always amazed by how tiny molecules come together to create incredible reactions. In the lab, every experiment feels like a little adventure. You never know what's gonna happen until you mix those chemicals and watch the magic unfold.One of my favorite things about chemistry is how it's applicable in so many fields. From medicine to engineering, chemistry is the foundation of so many amazing discoveries. It's like a gateway to understanding the world at a microscopic level.But let's not forget the challenges. Chemistry can be tough! There are so many formulas, reactions, and mechanisms to memorize. But that's what makes it exciting too. Solving a tough chemistry problem feels like cracking a code, and when you finally get it, the sense of accomplishment is incredible.In class, we often have group discussions where we share our ideas and experiment results. Those moments are so valuable because you learn so much from your peers. Everyone has a different perspective, and it really broadens your understanding of the subject.I also love how chemistry encourages creativity. Sometimes, you have to think outside the box to find a solution to a.。
介绍化工专业的认识英文作文
介绍化工专业的认识英文作文Understanding the Chemical Engineering Profession1. The Role of Chemical Engineers2. Core Areas of StudyThe foundation of chemical engineering lies in several core areas of study:Chemistry: A deep understanding of chemistry is essential for chemical engineers. They study chemical reactions, material properties, and reaction kinetics to develop and optimize chemical processes.Thermodynamics: Chemical engineers use thermodynamic principles to understand and predict the behavior of materials and energy during chemical processes. This knowledge is crucial for designing efficient systems and optimizing energy usage.Fluid Mechanics: This area focuses on the behavior of fluids in motion and at rest. Chemical engineers apply fluid mechanics principles to design and operate equipment such as pumps, reactors, and separation units.Heat and Mass Transfer: Understanding how heat and mass are transferred within chemical processes is vital for designing efficient systems. This includes studying heatexchangers, distillation columns, and other separation technologies.Process Control: Chemical engineers utilize processcontrol techniques to monitor and regulate chemical processes, ensuring they operate within desired parameters and maintain product quality.3. Practical ApplicationsChemical engineering is instrumental in numerouspractical applications that impact daily life and industry: Energy Production: In the energy sector, chemical engineers work on optimizing processes for extracting, refining, and utilizing energy sources, including fossil fuels, biofuels, and renewable energy.Environmental Protection: Chemical engineers contributeto environmental sustainability developing technologies for waste treatment, pollution control, and resource recovery. They work on projects aimed at reducing the environmental impact of industrial activities.Food and Beverage Industry: Chemical engineers design and optimize processes for food and beverage production, focusing on improving quality, safety, and efficiency in manufacturing.4. Challenges and InnovationsChemical engineering faces several challenges thatrequire innovative solutions:Sustainability: Chemical engineers are increasingly focused on developing sustainable processes and technologies that minimize environmental impact and promote the use of renewable resources.Safety: Ensuring safety in chemical processes is paramount. Chemical engineers must address potential hazards, implement safety protocols, and design systems that prevent accidents and protect workers and the environment.5. Future ProspectsConclusion。
对化学专业的看法的英语作文
对化学专业的看法的英语作文英文回答：Chemistry is the study of matter and its properties as well as how matter changes. It is a broad field that encompasses many different subdisciplines, including analytical chemistry, biochemistry, inorganic chemistry, organic chemistry, and physical chemistry. Chemists usetheir knowledge of chemistry to develop new materials, drugs, and technologies, and to solve problems in areassuch as energy, the environment, and health care.Chemistry is a challenging but rewarding field of study. It requires a strong foundation in mathematics and physics, as well as a good understanding of the scientific method. However, the rewards of a career in chemistry can be great. Chemists are in high demand in a variety of industries, and they can earn a good salary. Additionally, chemistry is a fascinating and intellectually stimulating field that can provide a lifelong source of learning and enjoyment.Here are some of the reasons why I am interested in studying chemistry:I am fascinated by the natural world and how it works. Chemistry is the study of the fundamental building blocksof matter, and it allows me to understand the world around me on a deeper level.I am interested in solving problems. Chemistry is a problem-solving discipline, and I enjoy using my knowledgeof chemistry to find solutions to real-world problems.I am creative and innovative. Chemistry is a creative field that allows me to express my creativity and develop new ideas.I am passionate about making a difference in the world. Chemistry is a powerful tool that can be used to solve important problems and improve people's lives.I believe that a career in chemistry would be a perfectfit for me. I am passionate about chemistry, and I am confident that I have the skills and abilities to succeed in this field. I am excited to learn more about chemistry and to use my knowledge to make a difference in the world.中文回答：我对化学专业的看法。
化学英语论文六篇
化学英语论文六篇化学英语论文范文1英语文学的翻译过程是一项简单的翻译过程，其中英语与汉语存在着诸多文化方面的差异，假如在英语文学的翻译过程中，对彼此的文化差异重视程度不够，就会给英语文学作品的正确翻译带来障碍，直接的影响到了英语文学翻译的实效性发挥，那么反之，只有在英语文学作品翻译的过程中，充分的关注英语文化与汉语文化之间存在的详细差异，并依据存在的差异奇妙的在翻译过程中，加以恰当的翻译处理，英语文学的翻译才能更具实效性，所以在详细的翻译过程中，能否采纳正确的翻译方法处理英语文学翻译中消失的两种语言文化所带来的差异，对于英语文学翻译质量的提升具有重要的意义。
也只有在翻译的过程中正确的把握彼此的文化差异，并且恰当的处理好由于这种文化差异所带来的翻译障碍，那么其所翻译的文学作品的精确性才值得信任。
文化因素应是英语文学翻译过程中需要考虑的重要因素，在翻译中只用语言直译的方式进行翻译，即使翻译的没问题，在忽视了英汉文化差异状况下，也很难让人有一个正确的理解，所以在翻译的过程中不仅要让其直接理解语言的内容，更重要的是让其理解语言背后具有迥异文化元素的内在含义，只有突破这种文化的障碍才能真正的翻译出好的英语文学作品。
二、英语文学翻译过程中正确处理文化差异的策略1.熟悉作品的体裁，正确处理彼此之间的文化差异英语文学的翻译与其文学体裁有着亲密的联系，不同的文学体裁所具有的特点也是不相同的，针对不同体裁的独有特点，依据源语言与翻译目的语言特点之间的差异性特征，娴熟的运用这些语言存在的特征，才能真正把英语文学作品翻译的更加完善，体现出不同体裁作品的不同风格。
但是，我们也要明确文学体裁的差异不等于其文化内涵与文化元素也存在着多大的差别，如针对科技内容英语文章的翻译，其蕴含的文化元素就相对较少，因此，对这一类文章的翻译，就很少考虑文化的差异，而针对小说、话剧的英语文学体裁文章的翻译，则在详细的翻译过程中，必需要考虑其所蕴含的文化内涵，假如不考虑其文化的元素而进行翻译，其作品翻译出来肯定让人感到枯燥和乏味，而失去了作品独有的文化魅力。
以化学为主修的英语作文
以化学为主修的英语作文Chemistry is a subject that has always fascinated me. From understanding the structure of atoms to exploring the different types of chemical reactions, there is so much to learn and discover. In this essay, I will discuss the importance of chemistry and how it has impacted the world around us.Chemistry plays a crucial role in our everyday lives. It is involved in everything we do, from the food we eat to the air we breathe. By studying chemistry, we can better understand the composition of substances and how they interact with each other. This knowledge is essential for various industries, such as pharmaceuticals, agriculture, and environmental science.In addition, chemistry has led to numerous technological advancements that have revolutionized the way we live. For example, the development of new materials and compounds has paved the way for innovations in medicine, electronics, and energy production. Without chemistry, many of the products and technologies we rely on today would not exist.Furthermore, chemistry has also played a significantrole in addressing global challenges, such as climate change and pollution. By studying chemical processes and their impact on the environment, scientists can develop sustainable solutions to reduce our carbon footprint and preserve natural resources. This is crucial for the future of our planet and the well-being of future generations.Overall, chemistry is a fascinating and essential subject that has far-reaching implications in our world. By studying chemistry, we can gain a deeper understanding of the natural world and use that knowledge to create positive change. I am grateful for the opportunity to learn about this incredible field and look forward to applying my knowledge to make a difference in the world.化学是一门让我着迷的学科。
有关化学专业的英语作文500字
有关化学专业的英语作文500字全文共6篇示例，供读者参考篇1Chemistry is So Cool!Hi there! My name is Jamie and I'm ten years old. I just started learning about chemistry in school this year and I think it's the coolest thing ever! Chemistry is all about studying the different kinds of matter and how they interact and change. It's like being a scientist and doing experiments to explore the world around us. Let me tell you all about it!In chemistry class, we get to wear safety goggles and lab coats like real scientists. We learn about all the different elements on the periodic table - you know, those symbols like H for hydrogen, O for oxygen, and so on. The periodic table organizes all the elements into groups based on their properties. Some elements are metals, which are shiny and solid at room temperature. Others are non-metals like gases or liquids. And some are weird in-between kinds called metalloids.My favorite part is definitely the experiments though! We get to mix different chemicals together and see what crazyreactions happen. Like when you combine vinegar and baking soda, they fizz up and make foam. That's because an acid (the vinegar) is reacting with a base (the baking soda) to make carbon dioxide gas. We captured the gas in a balloon and it inflated up like a bubble!Another awesome experiment was using blue litmus paper to test whether solutions are acids or bases. Acids turn the paper red, while bases turn it blue or purple. We dipped the paper in all sorts of household liquids like lemon juice, soap, and soda. I thought it was so neat how you could tell just from the color change.We also learned about the three states of matter - solids, liquids, and gases. Solids keep their shape and volume, like a rock or ice cube. Liquids take the shape of their container but keep the same volume, like water or milk. And gases expand to fill any container and don't have a fixed shape or volume, like the air we breathe. Isn't that wild?!My favorite states of matter are probably solids and liquids though, because you can really play around with those. Like making crystal gardens by dissolving chemicals in water and letting the crystals slowly regrow. Or doing the classic baking soda and vinegar volcano!Oh, and we can't forget about changes of state too! That's when matter goes from one state to another by heating or cooling. Like when you boil water, the liquid turns into water vapor (a gas). Or when it gets cold enough, water vapor in the air condenses into liquid water droplets or solid ice crystals. The temperature at which these changes happen is called the melting point, boiling point, or freezing point. So many cool concepts to learn about!I could honestly keep going on and on about all the awesome chemistry stuff we're covering. Like the difference between pure substances and mixtures, physical and chemical changes, acids and bases, and so much more. But I think you get the idea - chemistry is just the best subject ever!What I love most is how it helps explain so many things we see and interact with every day. All the materials around us, the processes that make the weather happen, even what's going on inside our own bodies - it all comes down to chemistry in the end. Understanding the basics gives you a window into how the whole universe works at a tiny molecular level. Is your mind blown yet?!Chemistry definitely requires using your brain and paying close attention in class. There are lots of definitions and conceptsto memorize. Not to mention getting comfortable with the lab equipment and procedures for experiments. But it's 100% worth the effort because it's just so fascinating to learn about! The magical, molecular world has so many mysteries left to uncover.I can't wait to take more advanced chemistry classes when I'm older and really dive deeper into this amazing field of science. Who knows, maybe I'll even become a chemist myself someday? Either way, I'm just grateful for the opportunity to start exploring chemistry now while I'm still a kid. This subject opens up a vivid new layer of understanding about the universe and how it works. If you're not convinced yet, I highly recommend giving chemistry a try! Trust me, it's going to blow your mind.篇2Chemistry Is Cool!Hi, my name is Emma and I'm in 5th grade. Today I want to tell you all about chemistry because I think it's the coolest science ever! Chemistry is all about the little tiny particles that make up everything in the whole universe. Those little particles are called atoms and molecules. Isn't that amazing?When I was younger, I didn't really understand what chemistry was. I just thought it was a bunch of boring facts youhad to memorize about elements and the periodic table. But then in 4th grade, we did this really cool experiment where we mixed vinegar and baking soda to make a volcano explode! My teacher explained that was a chemistry reaction happening right before our eyes. That's when I realized chemistry is full of awesome hands-on experiments and not just boring facts.Chemistry helps explain how the world works at the smallest levels. Like why do some things burst into flames while others don't? Why does soap get dishes clean? How does food go from a solid to a liquid when you cook it? The answers to questions like that are all about chemistry!There are so many different branches of chemistry too. Like organic chemistry which studies molecules that come from living things like plants and animals. Or biochemistry which looks at the crazy complex chemistry happening inside our bodies that keeps us alive. Or physical chemistry that deals with the physical properties of atoms and molecules. It's all just endlessly fascinating to me.One of the most important parts of chemistry is the periodic table. That big colorful chart lists all the different elements that exist in the entire universe! There are only 118 elements total, but they can combine in infinite ways to create every singlematerial object. From the screen you're reading this on, to the food you eat, to the billions of stars out in space - it's all just different combinations of those 118 elements. Wild, right?My favorite elements are definitely the gaseous ones like hydrogen, helium, and neon. I think gases are so cool because even though we can't see them, they're still real matter made of atoms floating all around us. Helium is especially awesome because it's what they put in birthday balloons to make them float! Although you're not supposed to inhale it because that can be dangerous. Still, balloons that can defy gravity just by containing helium? Chemistry magic!There are also loads of incredibly important real-world applications of chemistry. Like developing new medicines to cure diseases or figuring out renewable energy sources to reduce pollution. Or even just making all the household products we use every day like soap, toothpaste, cosmetics, and cleaning supplies. Can you imagine a world without chemistry? We wouldn't have any of those things!Chemistry has definitely become my favorite science subject. Although I guess biology is a close second because it's kind of like the chemistry of living organisms which is super interesting too. But there's just something about chemistry that feels moretangible and practical to me. Like it's not just abstract theories, but real concepts you can see working in the world all around you every single day.I'm honestly not sure if I want to become a chemist when I grow up or not. It seems like such an incredibly difficult field that requires a ton of math and problemsolving skills. And you have to go to school for like a million years to get a PhD in chemistry! But at the same time, I love chemistry so much that it could be worth all that hard work. I just feel like chemistry is this vast frontier with infinite mysteries still left to uncover about the universe and that's really exciting to me.No matter what career I end up choosing, I know chemistry will always be a passion of mine. I might not grow up to be a chemist per se, but the fundamentals of chemistry are crucial for all science fields. Even if I went into medicine or engineering or environmental science or something, I'd still need a really solid grasp of chemistry concepts. Heck, a basic understanding of chemistry is important for almost any career these days!So those are my thoughts on why chemistry is just the coolest science subject ever! It's all about exploring the hidden atomic worlds within matter that govern pretty much everything in our universe. As I get older and start taking more advancedchemistry classes, I'm sure my appreciation for this amazing field will only continue to grow. Who knows, maybe I'll even make some groundbreaking chemistry discovery one day! A girl can dream, right? Thanks for reading, chemistry rocks!篇3Chemistry is So Cool!Hi friends! Today I want to tell you all about one of my favorite subjects - chemistry! Chemistry is the study of matter and the changes it can go through. I think it's super fascinating and I'll explain why.First off, chemistry helps us understand everything around us since everything is made of matter. The air we breathe, the food we eat, our bodies, the Earth, the moon and stars - it's all matter! The three main states of matter are solids, liquids, and gases. Solids keep their shape, like a rock or a toy. Liquids take the shape of their container, like water or milk. And gases spread out to fill whatever space they're in, like the air around us.But here's where it gets really interesting - matter can change between those three states through chemical and physical changes! Physical changes just change how the matter looks but not what it's made of. Like if you crush up a crackerinto crumbs, it's still just a cracker, just in smaller pieces now. But chemical changes actually make a new kind of matter!One super cool example of a chemical change is burning a log in a fire. The log material chemically combines with oxygen from the air and undergoes combustion, turning into new materials like ashes, smoke, and gases. The original log matter is gone and new matter took its place. Crazy, right?Another awesome part of chemistry is getting to learn about all the different elements that make up everything. There are over 100 different naturally occurring elements like hydrogen, oxygen, carbon, iron, gold, and so on. Elements are the most basic kinds of matter and can't be broken down into anything simpler by chemical means.But elements almost never exist just by themselves. Instead, they bond together to form molecules and compounds. Like water is made of hydrogen and oxygen atoms bonded together into water molecules. Carbon dioxide that we exhale has carbon and oxygen atoms bonded together too.Speaking of breathing, let's talk about the chemistry happening inside our bodies! The foods we eat are broken down through tons of chemical reactions to give our bodies energy to grow and move around. We breathe in oxygen and it chemicallyreacts with the digested food to release the energy our bodies need. Isn't that wild? Chemistry is happening inside us all the time without us even realizing it!And chemistry doesn't just happen naturally - scientists can make all sorts of cool new materials and chemicals by conducting experiments. That's how we get things like plastics, fertilizers, medicines, cleaning products and more. Chemists mix different elements and compounds together under special conditions to make brand new kinds of matter that didn't exist before.I could go on and on about chemistry because there's just so much incredible stuff to learn! From the periodic table of elements to the structures of atoms and molecules, chemical bonding, acids and bases, organic chemistry, nuclear chemistry - I want to study it all!My dream is to become a chemical engineer when I grow up so I can put chemistry to use developing new materials and solutions to problems. Maybe I'll figure out a way to make more sustainable plastics that don't pollute the environment. Or discover a new source of renewable energy by understanding chemical reactions better. Or formulate a new life-saving medicine! The possibilities are endless.So that's why I think chemistry is just the coolest subject ever. It explains how the whole universe works at its most basic level. With chemistry knowledge, we can transform matter into anything we can imagine! I'm going to keep studying as hard as I can because the more I learn about chemistry, the more amazing I realize it is. I hope you're as excited about chemistry as I am now! Let's explore this incredible world of matter together.篇4My Big Dream of Being a ChemistHi there! My name is Sam and I'm 10 years old. I just finished 4th grade and I can't wait for summer vacation to be over so I can start 5th grade. School is really fun for me, especially science class. My favorite subject is chemistry - I find it super fascinating!I still remember the first time I learned about chemistry in2nd grade. Ms. Jenkins, my science teacher, did this really cool experiment where she mixed together some clear liquids and they turned bright purple! I was amazed. She called it a "chemical reaction." From that day on, I've been hooked on chemistry.In 3rd grade, we learned about the periodic table of elements. At first, I thought it was just a bunch of letters and numbers, but then I realized each one represented a differentkind of atom that makes up everything in the universe. My mind was blown! We did an activity where we had to make models of atoms out of styrofoam balls and toothpicks. I made hydrogen, carbon, and neon. Putting those little atom models together was so much fun.This past year in 4th grade, we really dove into chemical reactions and got to do a ton of hands-on experiments. One day, we combined baking soda and vinegar in these plastic bottles and the mixtures bubbled up like crazy volcanoes! Another time, we burned different colored flames by putting salts into the fire. I loved seeing the bright orange, green, and purple colors. Isn't it wild that fire can change colors based on what chemicals you add?My favorite experiment though was probably the one with the rust. We took some steel wool and put it in jars, some with just air and others with different liquids like water, vinegar, and soda. After leaving them for a few weeks, we saw that the steel wool in the air and vinegar jars had turned all rusty and flaky. Ms. Jenkins explained that was an oxidation reaction happening. Chemistry is so awesome for being able to explain how and why stuff like that happens!I've learned so much about chemistry already, but there's still SO much more I want to know. Like, how do chemists actually figure out what atoms are made of and how they bond together? What advanced tools and equipment do they use? What are some chemical processes involved in making medicines, fuels, cleaning products, and all the other chemicals we use every day? How can we use chemistry to solve problems like finding cures for diseases, developing better energy sources, or cleaning up the environment? The possibilities seem endless!That's why I've decided I want to become a chemist when I grow up. I'm going to take as many science classes as I can in middle school and high school to prepare. My parents are already saving money so I can go to a great university and study chemistry. Maybe I'll even get a Ph.D. and become a research chemist making new discoveries!I know it will take a lot of really hard work and perseverance, but I'm ready for the challenge. Chemistry is just so incredibly fascinating to me. Getting to experiment, explore, and uncover the secrets of how the world works on an atomic level...what could be more exciting than that? I can't wait to become an expert chemist!My friends think I'm a little weird for being obsessed with chemistry at such a young age. They'd rather spend their time playing video games or watching TikTok videos. But that's okay, I'm proud to be a chemistry nerd! I have big dreams and I'm determined to use my passion for chemistry to make the world a better place someday.Well, thanks for reading about my big ambitions! I better go study the periodic table again before bed. A chemist has to start learning early, you know? Take care!篇5Chemistry is So Cool!Hi friends! Today I want to tell you all about one of my favorite subjects - chemistry! Chemistry is the study of matter and what things are made of. It's super interesting and fun to learn about.First off, let me explain what matter is. Matter is anything that has mass and takes up space. So that means everything around you is made of matter - your desk, your clothes, even you! Matter can exist in three different states - solid, liquid, and gas. Solids keep their shape, like a rock or a book. Liquids take theshape of their container, like water in a glass. And gases spread out to fill any available space, like the air you breathe.All matter is made up of tiny particles called atoms. Atoms are the basic building blocks of everything! They are so incredibly small that you need a powerful microscope to see them. Atoms themselves are made up of even smaller particles called protons, neutrons, and electrons. It's mindblowing how something so tiny can make up all the materials in the world!In chemistry, we study how atoms combine together to form different substances. When two or more atoms bond together, they form a molecule. H2O is the molecule for water, made up of two hydrogen atoms and one oxygen atom bonded together. Table salt (NaCl) is another molecule made of one sodium atom and one chlorine atom. Pretty much everything you can think of is made up of unique molecules!One of the coolest parts of chemistry is doing experiments and seeing reactions happen right before your eyes. My favorite is the baking soda and vinegar volcano! When you mix those two together, it causes a chemical reaction that releases carbon dioxide gas, which makes it bubble up like a volcano. Another fun one is the elephant toothpaste experiment, where youcombine some household chemicals and suddenly it foams up like crazy!There are so many interesting topics we study in chemistry too. Learning about the periodic table and how elements are organized is wild. Did you know that the air you breathe is a mixture of different gases like nitrogen, oxygen, and carbon dioxide? And understanding things like acids, bases, and pH helps explain why you need to be careful with certain chemicals.Chemistry also helps us understand the world around us and how things work. Like why a puddle evaporates over time or how cleaning products can remove stains and dirt. Or even cooler - how fireworks get their bright colors from chemical reactions! Just about every material, medicine, food, and product involves chemistry in some way.I could honestly go on and on about chemistry because there is so much awesome stuff to learn. Like how soap gets things clean, or how photosynthesis happens in plants, or the different types of bonds that hold atoms together. Once you start learning about it, you realize chemistry is literally everywhere!What I love most about chemistry though is doing hands-on activities and experiments. There's nothing better than mixingsome chemicals together and watching an amazing reaction happen right in front of you. Or using science to solve a mystery about why something changes colors or bubbles up. Being a chemist means constantly learning through exploring and discovering.I definitely want to keep studying chemistry because there is still so much more I want to understand. Like how to make new materials and medicines that could really help people. Or finding sustainable ways to generate energy and fuel. Or just uncovering more secrets about the amazing chemistry happening all around us every single day. This subject is fascinating, fun, and SO important!If you haven't gotten into chemistry yet, I really think you should give it a try. Start by doing some simple experiments at home and read some books about it. Once you see how cool and exciting chemistry can be, you'll be hooked like me! Who knows, you might even decide to become a famous chemist one day too. Just remember to always be safe when working with chemicals and have an adult help you. Happy experimenting!篇6Certainly! Here's an essay of approximately 2,000 words about the field of chemistry, written from the perspective of a young student:Chemistry: The Magical ScienceHi there! My name is Emma, and I'm here to tell you all about the most amazing subject ever – chemistry! Now, I know what you're thinking, "Chemistry? Isn't that just a bunch of boring stuff about molecules and elements?" Well, let me tell you, it's so much more than that!Chemistry is like a magical world where you get to explore the secrets of how everything around us works. From the air we breathe to the food we eat, chemistry is everywhere! And let me tell you, it's super cool.Imagine being able to mix different substances together and create something completely new. It's like being a wizard or a mad scientist! You can make fizzy drinks, colorful smoke, or even make things explode (but don't try that at home without an adult, okay?).One of the coolest things about chemistry is learning about all the different elements. You know those periodic tables you see in science classrooms? Those are like the building blocks ofthe entire universe! Each element has its own special properties and can do all sorts of amazing things.For example, did you know that there's an element called sodium that can make things burn? Or that another element, carbon, is the key ingredient in diamonds? How cool is that? It's like learning a secret code that unlocks the mysteries of the world.And let's not forget about molecules! Molecules are like tiny little structures made up of different elements all working together. They're kind of like Lego pieces, but way, way smaller. And just like Legos, you can build all sorts of awesome things with them, like medicines that can make people feel better or even rocket fuel that can send spaceships into space!Speaking of medicines, chemistry is super important for making sure we stay healthy. Scientists use chemistry to create life-saving drugs and vaccines that can fight off diseases. It's like having a superhero team of tiny molecules protecting us from the bad guys (germs)!But chemistry isn't just about mixing things together and making cool stuff happen. It's also about understanding how the world works at a fundamental level. For example, have you ever wondered why water freezes when it gets really cold? Or whysome materials conduct electricity better than others? Well, chemistry has the answers to all those questions and so much more!And the best part? Chemistry is everywhere! You can do experiments in your kitchen, mixing ingredients to make delicious treats (with adult supervision, of course). Or you can go outside and explore the world around you, looking for examples of chemical reactions happening in nature.So, what do you say? Are you ready to dive into the magical world of chemistry? Trust me, it's an adventure you'll never forget!。
化学专题英语作文模板
化学专题英语作文模板英文回答：Chemistry: A Journey of Discovery。
Chemistry is the scientific study of the structure, properties, and behavior of matter. It is a fundamental science that has applications in many fields, including medicine, engineering, and agriculture.The history of chemistry can be traced back to ancient times. Alchemists in the Middle Ages were interested in transforming base metals into gold. Although they were unsuccessful in their quest, their work laid the foundation for modern chemistry.In the 18th century, Antoine Lavoisier developed the law of conservation of mass. This law states that mass is neither created nor destroyed in a chemical reaction. Lavoisier's work helped to establish chemistry as aquantitative science.In the 19th century, John Dalton developed the atomic theory. This theory states that all matter is composed of atoms. Dalton's work helped to explain the behavior of gases and the formation of chemical compounds.In the 20th century, chemists made great strides in understanding the structure of atoms. This led to the development of quantum mechanics, which is the theory that describes the behavior of atoms and molecules.Today, chemistry is a vast and complex science. Chemists are working to develop new materials, drugs, and treatments for diseases. They are also working to understand the environmental impact of chemicals and to develop sustainable solutions.Chemistry is a fascinating and challenging science. It is a science that is constantly evolving and that has the potential to make a positive impact on the world.中文回答：化学，发现之旅。
介绍化工专业的英语作文简短
介绍化工专业的英语作文简短英文回答：Chemical Engineering is a branch of engineering that deals with the application of scientific and mathematical principles to the production of chemicals, fuels, pharmaceuticals, food, and other products. Chemical engineers design and operate chemical plants and processes, and they work to improve the efficiency and safety of these processes.Chemical engineering is a challenging and rewarding field that offers a wide range of opportunities for employment. Chemical engineers can work in a variety of industries, including the chemical, pharmaceutical, food, and energy industries. They can also work in government agencies and research institutions.Chemical engineering is a rapidly growing field, and there is a high demand for qualified chemical engineers.The median annual salary for chemical engineers is $105,590, and the job outlook is expected to grow by 5% over the next ten years.If you are interested in a career in chemical engineering, there are several steps you can take toprepare yourself. First, you should earn a bachelor'sdegree in chemical engineering from an accredited program. Once you have a bachelor's degree, you may choose to earn a master's degree or doctorate in chemical engineering. You should also gain experience through internships and co-ops, and you should join professional organizations such as the American Institute of Chemical Engineers (AIChE).中文回答：化学工程是工程的一个分支，它涉及科学和数学原理在化学品、燃料、药品、食品和其他产品的生产中的应用。
化学专业英文作文范文
化学专业英文作文范文英文：Chemistry is a fascinating subject that deals with the study of matter and its properties. As a chemistry major, I have learned about the different types of chemical reactions, the behavior of atoms and molecules, and the principles of chemical bonding. I have also gainedpractical experience in the laboratory, conducting experiments and analyzing data.One of the most interesting topics in chemistry is organic chemistry, which is the study of carbon-based compounds. It is a complex subject that requires a lot of memorization and understanding of various concepts, such as functional groups and reaction mechanisms. However, it is also a very rewarding subject because it helps us understand the chemistry of living organisms and the processes that occur in our bodies.Another aspect of chemistry that I find fascinating is the use of analytical techniques to identify and quantify substances. For example, spectroscopy is a powerful toolthat allows us to determine the structure of molecules and the presence of certain functional groups. Chromatographyis another technique that is commonly used to separate and analyze mixtures of compounds.Overall, chemistry is a challenging but rewardingsubject that has many practical applications in fields such as medicine, materials science, and environmental science.中文：化学是一门迷人的学科，涉及物质及其性质的研究。
化学专业专业英语论文
Synthesis of Benzoic Acid湛江师范学院 11化本2班 2011xxxx1. Objectives(1) Learn the principle and methods of preparing benzoic acid by oxidative reaction.(2) Master the purification technique of recrystallization.2. principle3. Reagents Toluene 2.7ml (0.025mol);KMnO 4 8.5g; concentrated hydrochloric acid.4. Procedure(1) Place 100ml of water,4.5g of pure potassium permanganate and 2.7ml of toluene in a 250ml three-necked flask equipped with a sealed mechanical stirrer and reflux condenser (see Figure1-8). Stir the mixture and reflux gently until practically all the permanganate color has disappeared (about 2 hours).At this point add 4g more of potassium permanganate and reflux the mixture again until the permanganate color disappears (about 2 hours); the color of the solution can easily be seen by removing the flame and stopping the refluxing.The end of oxidation is also judged by disappearance of the permanganate of the oily toluene in the refluxing liquid.(2) Filter the hot contents of the flask from the manganese dioxide with suction.Wash the manganese dioxide with two 12ml portions of hot water.Cool combined solution.If the color of the filtrate is purple,add a small amount of of NaHSO 3 solution and re-filter.(3) Precipitate all the benzoic acid by cautiously adding 10ml of concentratedhydrochloric acid with continul strring. When cold, filter with suction,wash the acid with cold water and dry at 80℃.Upon recrystallization from hot water, the m.p. is raised to 120—122℃.5. Data recording and processingn: 0.025mol 0.025molm: 0.025×122.12gThe actual yield Ma=1.2gThe theoretical yield Mt=3.053gCH 34MnO 2 + KOH + H 2O ++2Cl COOHKCl ++1.2gW= ×100％=39.31％3.053g6.Notes:(1)A somewhat lower yield is obtain is obtained if all the potassium permanganate is added all at once and,furthermore,the reaction may become violent.A ddition in 2～3portions results in a more controllable reaction.(2)If the concentrated solution is not clear, it may be clarifid by the addition of 1g of activated charcoal.7.Questions(1).What are the primary factors influenced the yield of benzoic acid in the process of oxidative reaction ?Answer:Organic reaction by-products of more,the by-product will influence,and the amount of reactants will also affect the yield As well as the reaction conditions affect.。
化工专业英语写作范文
化工专业英语写作范文English:Chemical engineering is a highly complex and interdisciplinary field that encompasses the principles of chemistry, physics, mathematics, and engineering. The scope of study in chemical engineering includes design, development, operation, and optimization of processes and systems for the production of chemicals, fuels, materials, and pharmaceuticals. As a chemical engineering student, I have been exposed to various courses and practical experiences that have equipped me with the knowledge and skills necessary to tackle real-world challenges in the industry. Through courses such as thermodynamics, transport phenomena, and reaction engineering, I have gained a deep understanding of fundamental principles and their applications in designing and optimizing chemical processes. In addition, I have been involved in research projects and internships that have allowed me to apply theoretical concepts to practical problem-solving, further enhancing my problem-solving and critical thinking abilities. Furthermore, my involvement in extracurricular activities such as student organizations and competitions has honed my communication, teamwork, and leadership skills, all of which areessential in the chemical engineering profession. I am confident that my solid foundation in chemical engineering theory and practical experience makes me well-prepared to contribute to the industryand make a positive impact on society.中文翻译:化工是一个高度复杂且跨学科的领域，涵盖了化学、物理、数学和工程的原理。
化学专业英文作文范文
化学专业英文作文范文Studying chemistry is like unlocking the secrets of the universe. It's all about understanding the properties, composition, and behavior of matter. From the tiniest atoms to the complex molecules, chemistry helps us make sense of the world around us.Chemistry is not just about mixing chemicals in a lab. It's also about understanding the impact of chemical processes on the environment. We need to find ways to minimize pollution and develop sustainable energy sources. Chemistry plays a crucial role in creating a better, cleaner world for future generations.One of the most fascinating aspects of chemistry is the way it connects with other scientific disciplines. It overlaps with physics, biology, and even astronomy. This interdisciplinary nature makes chemistry an exciting field to study, as it offers endless opportunities for collaboration and discovery.Chemistry is also deeply rooted in everyday life. From the food we eat to the medicines we take, chemistry is everywhere. It's the science behind cooking, cleaning, and even the technology we use. Understanding chemistry can help us make informed choices about our health and the products we use.As a chemistry major, I have the opportunity to conduct experiments and research that can have real-world applications. Whether it's developing new materials, improving drug formulations, or finding ways to reduce environmental impact, chemistry offers endlesspossibilities to make a positive impact on society.。
有关化学专业的英语作文 样本
有关化学专业的英语作文样本Chemistry is an intriguing field of study that fascinates many individuals around the world. It is a science that examines the properties, composition, and behavior of substances. From exploring the structure of molecules to understanding chemical reactions, chemistry plays a crucial role in various industries and aspects of our daily lives.In the realm of academia, pursuing a degree in chemistry opens up a world of opportunities for students. Through theoretical lectures and hands-on laboratory experiments, students delve into the intricate world of chemical compounds and reactions. They learn about the periodic table, atomic structure, bonding theories, and spectroscopy techniques. The study of chemistry equips students with critical thinking skills and problem-solving abilities essential for addressing complex scientific challenges.Moreover, chemistry transcends the confines of laboratories as its principles find widespread application in different sectors. In the pharmaceutical industry, chemists worktirelessly to develop new drugs that combat diseases and improve healthcare outcomes. From formulating novel drug compounds to analyzing their potency and side effects, chemists play a vital role in advancing medical science.Similarly, in environmental chemistry, researchers focus on studying pollutants and their impact on ecosystems. By analyzing air, water, and soil samples, environmental chemists identify sources of contamination and propose solutions to mitigate environmental degradation. Their work is instrumental in safeguarding natural resources and promoting sustainable practices for future generations.Furthermore, chemistry intersects with other disciplines such as materials science, biochemistry, and nanotechnology to drive innovation across industries. In material science research labs, chemists design new materials with specific properties for diverse applications ranging from construction materials to electronic devices. In biochemistry laboratories, scientists unravel the biochemical processes within living organisms to develop new therapies for diseases.In conclusion, chemistry is an ever-evolving field that continues to push boundaries and inspire discoveries. Whether it's unraveling the mysteries of the universe at atomic scales or developing groundbreaking technologies for a sustainable future, chemistry remains at the forefront of scientific progress. As aspiring chemists embark on their academic journey or seasoned professionals strive for innovative breakthroughs, the allure of chemistry lies in its endless possibilities to transform our world through knowledge and experimentation.Should you have any further inquiries or require additional information regarding this topic on English essays related to Chemistry professional content standards by 2021 –do not hesitate to write back.。
化学专业英语结课论文
化学专业英语结课论文摘要;化学科学技术发展战略更加贴近社会和经济需求, 生态环境恶化严重干扰可持续发展。
化学科学技术活动总目标是:提供安全的能量、化学品和制造品, 既不会不可逆转地消耗地球上的稀有原料, 也不会产生有害物质污染地球;发现和创新新物质, 研究物质的化学和物理转化, 检测鉴定各种尺度物质的结构和性质;理论化学、计算化学和过程系统工程的创新应用, 及其与生物学、医药、电子学、信息学协同并在材料、医药、能源、信息、环境以及国家安全领域激励人心的应用。
科学研究和人才培养都充满学科交叉。
关键词:化学科学技术;人与自然协调;可持续发展;创新Chemical Science and Technology and Sustainable DevelopmentAbstract:Development strategy of chemical science and technology depends more and more on the demand of society and economic development nowadays, while the environment deterioration seriously interferes the sustainable development.So the chief objectives of chemical science and technology are:to provide safe energy, chemicals and products;not to consume the rare materials on earth irreversibly;not to produce harmful wastes to pollute the environment;to discover and innovate new compounds;to make research on the chemical and physical transformation of substances;to detect and determine the structures and the properties of materials of various sizes;and to make the innovative application of theoretical chemistry, computer chemistry and processing systematic engineering and their synergies with biology, pharmaceutics, electronic sand informatics for the application in the fields of materials, pharmaceutics, energy resources, information, environment and national security .Subject intersection always penetrates in scientific research and talent cultivation.Key words:chemical science and technology;harmony of human and nature;sustainable development; discover and innovate[1]1 “教”之道1.1 与时俱进，科学合理安排教学内容材料化学的知识面很广，相应的《材料化学专业英语》既要综合非金属材料又要涵盖高分子材料，既要涉及单一材料，又要涉及复合材料，既要涉及结构材料又要涉及功能材料，此外还要与大学基础英语相衔接又要为学生以后毕业论文中摘要的书写及以后研究生深造的英语打好基础，覆盖面广，且各方面的知识更新的很快!所以在教学内容安排上，必须科学合理，与时俱进![2]1.2 走人与自然协调的可持续发展之路通过几年的教学改革,学生对以专业阅读为基础,强调培养专业英语的实际应用能力和学术交流能力的化学专业英语课程的教学内容、培养方式普遍认可。
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Synthesis of Benzoic Acid
湛江师范学院 11化本2班 2011xxxx
1. Objectives
(1) Learn the principle and methods of preparing benzoic acid by oxidative reaction.
(2) Master the purification technique of recrystallization.
2. principle
3. Reagents Toluene 2.7ml (0.025mol);KMnO 4 8.5g; concentrated hydrochloric acid.
4. Procedure
(1) Place 100ml of water,4.5g of pure potassium permanganate and 2.7ml of toluene in a 250ml three-necked flask equipped with a sealed mechanical stirrer and reflux condenser (see Figure1-8). Stir the mixture and reflux gently until practically all the permanganate color has disappeared (about 2 hours).At this point add 4g more of potassium permanganate and reflux the mixture again until the permanganate color disappears (about 2 hours); the color of the solution can easily be seen by removing the flame and stopping the refluxing.The end of oxidation is also judged by disappearance of the permanganate of the oily toluene in the refluxing liquid.
(2) Filter the hot contents of the flask from the manganese dioxide with suction.
Wash the manganese dioxide with two 12ml portions of hot water.Cool combined solution.If the color of the filtrate is purple,add a small amount of of NaHSO 3 solution and re-filter.
(3) Precipitate all the benzoic acid by cautiously adding 10ml of concentrated
hydrochloric acid with continul strring. When cold, filter with suction,wash the acid with cold water and dry at 80℃.Upon recrystallization from hot water, the m.p. is raised to 120—122℃.
5. Data recording and processing
n: 0.025mol 0.025mol
m: 0.025×122.12g
The actual yield Ma=1.2g
The theoretical yield Mt=3.053g
CH 34MnO 2 + KOH + H 2O ++2Cl COOH
KCl ++
1.2g
W= ×100％=39.31％
3.053g
6.Notes:
(1)A somewhat lower yield is obtain is obtained if all the potassium permanganate is added all at once and,furthermore,the reaction may become violent.A ddition in 2～3portions results in a more controllable reaction.
(2)If the concentrated solution is not clear, it may be clarifid by the addition of 1g of activated charcoal.
7.Questions
(1).What are the primary factors influenced the yield of benzoic acid in the process of oxidative reaction ?
Answer:Organic reaction by-products of more,the by-product will influence,and the amount of reactants will also affect the yield As well as the reaction conditions affect.。