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题型:单选题 题类:常考题 难易度:普通
内蒙古杭锦后旗奋斗中学2016-2017学年高三上学期化学开学考试试卷
C(s)+H2O(g)=CO(g)+H2(g) ΔH=b kJ·mol-1
H-H、O-H和O=O键的键能分别为436、462和495kJ·mol-1 , 则b为( )
①C4H10(g)+ O2(g)═4CO2(g)+5H2O(l);△H=﹣2 878kJ•mol﹣1
②C4H10(g)+ O2(g)═4CO2(g)+5H2O(g);△H=﹣2 658kJ•mol﹣1
③C4H10(g)+ O2(g)═4CO(g)+5H2O(l);△H=﹣1 746kJ•mol﹣1
④C4H10(g)+ O2(g)═4CO(g)+5H2O(g);△H=﹣1 526kJ•mol﹣1
由此判断,正丁烷的燃烧热为( )
N2(g)+3H2O(l)=2NH3(g)+1.5O2(g),△H.
已知:N2(g)+3H2(g)=2NH3(g)△H=a kJ/mol,
2H2(g)+O2(g)=2H2O(l)△H=b kJ/mol,
则N2(g)+3H2O(l)=2NH3(g)+1.5O2(g)的△H={#blank#}1{#/blank#}kJ/mol(用含a、b的式子表示).
①CO(g)+2H2(g) CH3OH(g)ΔH1
②CO2(g)+3H2(g) CH3OH(g)+H2O(g)ΔH2
③CO2(g)+H2(g) CO(g)+H2O(g)ΔH3
回答下列问题:
反应I:CO(g)+2H2(g) CH3OH(g) ΔH1
反应II:CO2(g)+3H2(g) CH3OH(g) + H2O(g) ΔH2
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