摘要：5．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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