省句中高三化学一轮复习教学案化学能与热能

省句中20XX届高三化学一轮复习教学案——化学能与热能一（The 2013 high school chemistry review teaching case in chemistry sentence -- chemical energy and heat energy one）

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The 2013 senior middle school chemistry round review teaching case

Chemical energy and heat energy

Test site description:

1. can explain the reasons for energy conversion in chemical reactions, and know the common forms of energy conversion in chemical reactions

2. understand the mutual transformation and application of chemical energy and heat energy, and understand the concepts of endothermic reaction, exothermic reaction and reaction heat

3. understand the meaning of thermochemical equations, and calculate the heat of reaction simply according to the laws of Hess

4., understanding energy is an important basis for human survival and social development, and understanding the important role of chemistry in solving the energy crisis

Knowledge carding:

Enthalpy change of chemical reaction

1. energy change in chemical reactions

(1) two changes in chemical reactions: ________ change and

_________ change

(2) two conservation in chemical reactions: ________ conservation and conservation _________

(3) the form of energy conversion in chemical reactions: ______, light and electricity etc.

There are mainly ______ changes

2. enthalpy change and reaction heat

(1) definition: in ________ under the condition of reaction ____________

(2): ________ symbol

(3): ____________ or ____________

3. endothermic reaction and exothermic reaction

(1) from the point of view of the relative size of the total energy of the reactant and the producer, as shown

(2) from the point of view of the quantitative parameter of

reaction heat - the bond energy

(3) the basic formula for the reaction heat H

Total energy of the H= product - total energy of the reactants

The sum of the total bond energy of a H= reactant and the sum of the total bond energy of the resultant

(4) common exothermic reaction

Combustion of combustible matter; acid base neutralization reaction; most chemical reactions;

Replacement reaction of metal and acid; slow oxidation of matter

(5) common endothermic reactions

Most of the decomposition reactions; hydrolysis of salts and ionization of weak electrolytes;

The reaction of Ba (OH) 2 and 8H2O with NH4Cl; the reaction of carbon and water vapor, C and CO2;

Example 1. the energy change of a system during a reaction is as shown

The reaction process of A. can be expressed as...

The energy difference between the average energy of B.E1 and