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题型:单选题 题类:常考题 难易度:普通
安徽省青阳县第一中学2019-2020学年高二上学期化学9月月考试卷
①2C2H2(g)+5O2(g)═4CO2(g)+2H2O( l )△H1=﹣2602.0kJ•mol﹣1
②C(s)+O2(g)═CO2( g )△H2=﹣393.5kJ•mol﹣1
③H2(g)+ O2(g)═H2O( l )△H3=﹣285.8kJ•mol﹣1
则反应④2C(s)+H2(g)═C2H2( g )的△H为{#blank#}1{#/blank#}.
C6H12O6(g)= C6H12O6(s), △H2
C6H12O6(s)+6O2(g)= 6H2O(g) +6CO2(g), △H3
C6H12O6(g)+6O2(g)= 6H2O(l) +6CO2(g), △H4 下列说法正确的是( )
Ⅰ.CO(g)+2H2(g) CH3OH(g)△H1
Ⅱ.CO2(g)+3H2(g) CH3OH(g)+H2O(g)△H2
Ⅲ.CO(g)+H2O(g) CO2(g)+H2(g)△H3
回答下列问题
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