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题型:单选题 题类:常考题 难易度:普通
2016-2017学年河北省邯郸市成安一中、永年二中联考高二上学期期中化学试卷
一定温度下,在一恒容的密闭容器中,由CO和H2合成甲醇:CO(g)+2H2(g)⇌CH3OH(g)△H<0
①CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H=﹣890.3kJ•mol﹣1
②2H2(g)+O2(g)═2H2O(l)△H=﹣571.6kJ•mol﹣1
③C(s)+O2(g)═CO2(g)△H=﹣393.5kJ•mol﹣1
① H2(g)+ O2(g)=H2O(l) ΔH =-285kJ/mol
② H2(g)+ O2(g)=H2O(g) ΔH =-241.8kJ/mol
③ C(s)+ O2(g)=CO(g) ΔH =-110.4 kJ/mol
④ C(s)+ O2(g)=CO2(g) ΔH =-393.5 kJ/mol
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