估计下列各变化过程是熵增加还是熵减小。?
(1)NH4NO3爆炸:2NH4NO3(s)2N2(g)+4H2O(g)+O2(g)( )?
(2)水煤气转化:CO(g)+H2O(g)CO2(g)+H2(g)( )?
(3)臭氧的生成:3O2(g)2O3(g)( )?
A.熵增大 B.熵减小 C.不变 D.熵变很小