题干
已知：
(1)Zn(s)＋1/2O2(g) = ZnO(s) △H =－348.3 kJ/mol
(2) 2Ag(s)＋1/2O2(g) = Ag2O(s) △H =－31.0 kJ/mol
则Zn(s)＋Ag2O(s) = ZnO(s)＋2Ag(s)的△H等于（ ）
(1)Zn(s)＋1/2O2(g) = ZnO(s) △H =－348.3 kJ/mol
(2) 2Ag(s)＋1/2O2(g) = Ag2O(s) △H =－31.0 kJ/mol则Zn(s)＋Ag2O(s) = ZnO(s)＋2Ag(s)的△H等于（ ）
A：－317.3 kJ/mol
B：－379.3 kJ/mol
C：－332.8 kJ/mol
D：317.3 kJ/mol
答案(点此获取答案解析）
A