各种物质的热容

附录Ⅶ物质的摩尔热容(100kPa)

(1)单质和无机物

物质C p,m (298.15K)

C p,m =a+bT+cT2,或C p,m =a+bT+c′T-2

a b×103c×106c′×10-5适用温度

范围/K J·K-1·mol-1J·K-1·mol-1J·mol-1·K-2J·mol-1·K-3J·K·mol-1

Ag(s)25.4823.97 5.284-0.25293～1234 Ag2O(s)65.57

Al(s)24.3520.6712.38273～931.7 Al2O3-α79.092.3837.535-26.86127～1937 Al2(SO4)3(s)259.4368.5761.92-113.47298～1100 Br2(g)35.9937.200.690-1.188300～1500 Br2(l)35.6

C(金刚石) 6.079.1213.22-6.19298～1200 C(石墨)8.6617.15 4.27-8.79298～2300 CO(g)29.14227.6 5.0290～2500 CO2(g)37.12044.149.04-8.54298～2500 Ca(s)26.2721.9214.64273～673 CaC2(s)62.3468.611.88-8.66298～720 CaCO3(方解石)81.83104.5221.92-25.94298～1200 CaCl2(s)72.6371.8812.72-2.51298～1055 CaO(s)48.5343.83 4.52-6.52298～1800 Ca(OH)2(s)84.5

CaSO4(硬石膏)97.6577.4991.92-6.561273～1373 Cl2(g)33.936.69 1.05-2.523273～1500 Cu(s)24.4724.56 4.18-1.201273～1357 CuO(s)44.438.7920.08298～1250 Cu2O-α69.862.3423.85298～1200 F2(g)31.4634.69 1.84-3.35273～200 Fe-α25.2317.2826.69273～1041 FeCO3(s)82.1348.66112.1298～885 FeO(s)51.152.80 6.242-3.188273～1173 Fe2O3(s)104.697.7417.13-12.887298～1100 Fe3O4(s)143.4278.91-41.88298～1100 H(g)20.80

(2).有机化合物在指定温度范围内恒压热容可用下式计算：C p,m =a+bT+cT2+dT3

C2H6(g),乙烷

CH3OH(l),甲醇CH3COOH(l),乙酸