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题型:单选题 题类:常考题 难易度:普通

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
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