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题型:单选题 题类:常考题 难易度:普通
浙江省绍兴市嵊州中学2016-2017学年高二上学期化学期末考试试卷
2Hg(l)+O2(g)=2HgO(s)△H=﹣181.6kJ•mol﹣1
则反应Zn(s)+HgO(s)=ZnO(s)+Hg(l)的△H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( )
①2H2O(g)=O2(g)+2H2(g)ΔH1 K1=x
②Cl2(g)+H2(g)=2HCl(g)ΔH2 K2=y
③2Cl2(g)+2H2O(g)=4HCl(g)+O2(g)ΔH3 K3=z
则下列关系正确的是( )
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