已知: (1)Zn(s)+1/2O2(g)=ZnO(s) ΔH=-348.3kJ
题型:选择题
问题:
已知:
(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.+379.3kJ/mol
C.-332.8kJ/mol
D.+317.3 kJ/mol
已知:
(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.+379.3kJ/mol
C.-332.8kJ/mol
D.+317.3 kJ/mol