试题 试卷
题型:单选题 题类:常考题 难易度:普通
2016-2017学年内蒙古乌兰察布市集宁一中高二上学期期中化学试卷
1)C(s)+O2(g)=CO2(g)△H1=﹣393.5kJ/mol
2)CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l)△H2=﹣870.3kJ/mol
3)H2(g)+ O2(g)=H2O(l)△H3=﹣285.8kJ/mol
则反应2C(s)+2H2(g)+O2(g)=CH3COOH(l) 的反应热(焓变)为( )
① CO(g)+2H2(g) CH3OH(g) △H 1=-90.7 kJ·mol-1
② 2CH3OH(g) CH3OCH3(g)+H2O(g) △H 2=-23.5 kJ·mol-1
③ CO(g)+H2O(g) CO2(g)+H2(g) △H 3=-41.2kJ·mol-1
回答下列问题:
2H2O2(l)=2H2O(l)+O2(g) △H2
2H2(g)+O2(g)=2H2O(l) △H3
则反应Cu(s)+H2O2(l)+2H+(aq)=Cu2+(aq)+2H2O(l))的△H是( )
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