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题型:单选题 题类:常考题 难易度:普通
贵州省思南中学2018-2019学年高二上学期化学期中考试试卷
2H2(g)+O2(g)═2H2O(g)△H2 C(s)+O2(g)=CO2(g)△H3 , 则反应4C3H5(ONO2)3(l)═12CO2(g)+10H2O(g)+O2(g)+6N2(g)的△H为( )
①CH3COOH(l)+2O2(g)═2CO2(g)+2H2O(l)△H1=﹣870.3kJ/mol
②C(s)+O2(g)═CO2(g)△H2=﹣393.5kJ/mol
③H2(g)+O2(g)═H2O(l)△H3=﹣285.8kJ/mol
则反应2C(s)+2H2(g)+O2(g)═CH3COOH(l)的焓变为( )
①2CH3OH(g)=CH3OCH3(g)+H2O(g)△H1=﹣23.9kJ/mol
②2CH3OH(g)=C2H4(g)+2H2O(g)△H2=﹣29.1kJ/mol
③C2H5OH(g)=CH3OCH3(g)△H3=+50.7kJ/mol
则C2H4(g)+H2O(g)=C2H5OH(g)的是△H( )
①C(s)+O2(g)=CO2(g)△H1=﹣393.5kJ•mol﹣1;
②H2(g)+ O2(g)=H2O(g)△H2=﹣242.0kJ•mol﹣1;
③CO(g)+ O2(g)=CO2(g)△H3=﹣283.0kJ•mol﹣1;
试回答:
Na2O2(s)+CO2(g)=Na2CO3(s)+1/2O2(g) ΔH=-266 kJ·mol-1
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