H = U + pV,p是体系压力,如果平衡时也是外压.
单原子理想气体时,U = 1.5nRT,H = U + pV = 1.5nRT + nRT = 2.5nRT
也就是说单原子理想气体的摩尔等容热容Cv = 1.5R,摩尔等压热容Cp = 2.5R
H = U + pV,p是体系压力,如果平衡时也是外压.
单原子理想气体时,U = 1.5nRT,H = U + pV = 1.5nRT + nRT = 2.5nRT
也就是说单原子理想气体的摩尔等容热容Cv = 1.5R,摩尔等压热容Cp = 2.5R