9.已知:+O2.△H=-348.3kJ/mol +O2(g)====Ag2O(s).△H=-31.0kJ/mol 则Zn与Ag2O反应生成ZnO和Ag的热化学方程式为 ( ) A.Zn(s)+Ag2O.△H=317.3kJ/mol B.Zn+Ag2O=====ZnO+2Ag.△H=317.3kJ/mol C.Zn(s)+Ag2O.△H=-317.3kJ/mol D.2Zn(s)+2Ag2O.△H=-317.3kJ 查看更多

 

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已知:(1)Zn(s)+O2(g)====ZnO(s),△H=-348.3kJ/mol

(2)2Ag(s)+O2(g)====Ag2O(s),△H=-31.0kJ/mol

则Zn与Ag2O反应生成ZnO和Ag的热化学方程式为(   )

A.Zn(s)十Ag2O(s)====ZnO(s)+2Ag(s),△H=317.3kJ/mol

B.Zn+Ag2O=====ZnO+2Ag,△H=317.3kJ/mol

C.Zn(s)+Ag2O(s)=====ZnO(s)+2Ag(s),△H=-317.3kJ/mol

D.2Zn(s)+2Ag2O(s)=====2ZnO(s)+4Ag(s),△H=-317.3kJ

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 已知:(1)Zn(s)+1/2O2(g)==ZnO(s),ΔH = -348.3kJ/mol

            (2)2Ag(s)+1/2 O2(g)== Ag2O(s),ΔH = -31.0kJ/mol

则Zn(s)+ Ag2O(s) == ZnO(s) + 2Ag(s) 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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已知:(1)Zn(s)+1/2O2(g)==ZnO(s),ΔH = -348.3kJ/mol

(2)2Ag(s)+1/2 O2(g)== Ag2O(s),ΔH = -31.0kJ/mol

则Zn(s)+ Ag2O(s) == ZnO(s) + 2Ag(s) 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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