题目内容
已知:
(1)Zn(s)+1/2O2(g) = ZnO(s) △H =-348.3 kJ/mol
(2) 2Ag(s)+1/2O2(g) = Ag2O(s) △H =-31.0 kJ/mol
则Zn(s)+Ag2O(s) = ZnO(s)+2Ag(s)的△H等于( )
(1)Zn(s)+1/2O2(g) = ZnO(s) △H =-348.3 kJ/mol
(2) 2Ag(s)+1/2O2(g) = Ag2O(s) △H =-31.0 kJ/mol
则Zn(s)+Ag2O(s) = ZnO(s)+2Ag(s)的△H等于( )
A.-317.3 kJ/mol | B.-379.3 kJ/mol |
C.-332.8 kJ/mol | D.317.3 kJ/mol |
A
考查反应热的计算,根据盖斯定律求解即可
①-②得:Zn(s)+Ag2O(s) = ZnO(s)+2Ag(s) △H =-317.3kJ/mol,故答案为A
①-②得:Zn(s)+Ag2O(s) = ZnO(s)+2Ag(s) △H =-317.3kJ/mol,故答案为A
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