摘要：已知:+1/2O2.ΔH=-348.3kJ/mol +1/2 O2(g)== Ag2O(s).ΔH=-31.0kJ/mol 则Zn(s)+ Ag2O的ΔH等于 ( ) A．-317.3kJ/mol B．-379.3kJ/mol C．-332.8 kJ/mol D．317.3 kJ/mol

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