A
将方程式(1)Zn(s)+1/2O 2(g)=ZnO(s); △ H =-348.3 kJ/mol;(2)2Ag(s)+1/2O 2(g)=Ag 2O(s); △ H =-31.0 kJ/mol;两方程式叠加,可得Zn(s)+Ag 2O(s)=ZnO(s)+2Ag(s); △ H =-317.3 kJ/mol
A
将方程式(1)Zn(s)+1/2O 2(g)=ZnO(s); △ H =-348.3 kJ/mol;(2)2Ag(s)+1/2O 2(g)=Ag 2O(s); △ H =-31.0 kJ/mol;两方程式叠加,可得Zn(s)+Ag 2O(s)=ZnO(s)+2Ag(s); △ H =-317.3 kJ/mol