已知下列热化学方程式:
(1)Zn(s)+1/2O2(g)=ZnO(s),ΔH=-348.3kJ/mol
(2)2Ag(s)+1/2O2(g)=Ag2O(s),ΔH=-31.0kJ/mol
则ZnO(s)+2Ag(s)=Zn(s)+Ag2O(s)的ΔH等于
A.-317.3kJ/mol | B.+317.3 kJ/mol |
C.-379.3kJ/mol | D.-332.8kJ/mol |
已知下列热化学方程式:
(1)Zn(s)+1/2O2(g)=ZnO(s),ΔH=-348.3kJ/mol
(2)2Ag(s)+1/2O2(g)=Ag2O(s),ΔH=-31.0kJ/mol
则ZnO(s)+2Ag(s)=Zn(s)+Ag2O(s)的ΔH等于
A.-317.3kJ/mol | B.+317.3 kJ/mol |
C.-379.3kJ/mol | D.-332.8kJ/mol |