题型:问答题 简答题 已知:(1)Zn(s)+1/2O2(g)==ZnO(s) ΔH=-348.3kJ/mol (2)2Ag(s)+1/2 O2(g)== Ag2O(s) ΔH=-31.0kJ/mol 则Zn(s)+ Ag2O(s)== ZnO(s)+ 2Ag(s)的ΔH等于[ ]A.-317.3kJ/mol B.-379.3kJ/mol C.-332.8 kJ/molD.317.3 kJ/mol 查看答案