题目内容
已知:①NH3(g)+HCl(g)==NH4Cl(s) △H1=-176 kJ·mol-1②NH3 (g
(aq) △H2=-35.1 kJ·mol-1③HCl(g)
HCl(aq) △H3=-72. 3 kJ·mol-1④NH3 (aq) +HCl(aq)==NH4Cl(aq) △H4=-52. 3 kJ·mol-1⑤NH4Cl(s)
NH4Cl(aq) △H5则第⑤个热化学方程式中△H5为
2021-09-17
A.+16.3 kJ·mol-1
B.-16.3 kJ·mol-1
C.+335.7 kJ·mol-1
D.-335.7 kJ·mol-1