题目:
下列表述中正确的是( )
A.任何能使熵值减小的过程都能自发进行
B.已知:2SO2(g)+O2(g)2SO3(g):△H=-197kJ/mol.实验测得4molSO2参加上述反应放出354kJ热量,则SO2的转化率最接近于90%
C.在Na2SO4溶液中加入过量的BaCl2后,溶液中不存在SO42-
D.1mol NaOH分别和1mol CH3COOH、1molHNO3反应,后者比前者△H大
答案:
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