试题 试卷
题型:单选题 题类:常考题 难易度:普通
广东省广州市培才高级中学2016-2017学年高二上学期化学期中考试试卷
①C2H2(g)+ O2(g)═2CO2(g)+H2O(l)△H1=﹣1301.0kJ•mol﹣1
②C(s)+O2(g)═CO2(g)△H2=﹣393.5kJ•mol﹣1
③H2(g)+ O2(g)═H2O(1)△H3=﹣285.8kJ•mol﹣1
则反应④2C(s)+H2(g)═C2H2(g)的△H为( )
则Zn(s)+Ag2O(s)═ZnO(s)+2Ag(s)的△H等于( )
①CH4(g) + O2(g)= CO (g)+ 2H2O(g) H1 = a kJ·mol-1
②CH4 (g)+ 2O2(g)= CO2(g) + 2H2O(g) H2 = b kJ·mol-1
③C (s)+ O2 (g) = CO (g) H3= c kJ·mol-1
④H2 (g)+ O2 (g)=H2O (l) H4 =d kJ·mol-1
反应Ⅰ:CO2(g)+3H2(g) CH3OH(g)+H2O(g) △H1=-49.6 kJ/mol
反应Ⅱ:CH3OCH3(g)+H2O(g) 2CH3OH(g) △H2=+23.4 kJ/mol
反应Ⅲ:2CO2(g)+6H2(g) CH3OCH3(g)+3H2O(g) △H3
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