已知： (1)Zn(s)＋1/2O₂(g) = ZnO(s)；ΔH =－348.3 kJ/mol；(2)2Ag(s)＋1/2O₂(g) = Ag₂O(s)；ΔH =－31.0 kJ/mol，则Zn(s)＋Ag₂O(s) = ZnO(s)＋2Ag(s)的ΔH等于（  ）

A．－317.3 kJ/mol         B．－379.3 kJ/mol      C．－332.8 kJ/mol           D．317.3 kJ/mol

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（    ）

A. －317.3 kJ/mol     B. －379.3 kJ/mol 

 C. －332.8 kJ/mol     D. 317.3 kJ/mol

已知：(1)Zn(s)＋1/2O₂(g) = ZnO(s)；ΔH =－348.3 kJ/mol；(2)2Ag(s)＋1/2O₂(g) = Ag₂O(s)；ΔH =－31.0 kJ/mol，则Zn(s)＋Ag₂O(s) = ZnO(s)＋2Ag(s)的?ΔH等于（ ）

(2)2Ag(s)+O₂(g)Ag₂O(s)；ΔH=-31.0 kJ·mol^-1

则Zn与Ag₂O反应生成ZnO和Ag的热化学方程式为

A.Zn(s)+Ag₂O(s)ZnO(s)+2Ag(s)；ΔH=317.3 kJ·mol^-1

B.Zn+Ag₂OZnO+2Ag；ΔH=317.3 kJ·mol^-1

C.Zn(s)+Ag₂O(s)ZnO(s)+2Ag(s)；ΔH=-317.3 kJ·mol^-1

D.2Zn(s)+2Ag₂O(s)2ZnO(s)+4Ag(s)；ΔH=-317.3 kJ

(2)2Ag(s)+O₂(g)Ag₂O(s)；ΔH=-31.0 kJ·mol^-1

则Zn与Ag₂O反应生成ZnO和Ag的热化学方程式为

A.Zn(s)+Ag₂O(s)ZnO(s)+2Ag(s)；ΔH=317.3 kJ·mol^-1

B.Zn+Ag₂OZnO+2Ag；ΔH=317.3 kJ·mol^-1

C.Zn(s)+Ag₂O(s)ZnO(s)+2Ag(s)；ΔH=-317.3 kJ·mol^-1

D.2Zn(s)+2Ag₂O(s)2ZnO(s)+4Ag(s)；ΔH=-317.3 kJ·mol^-1