试题 试卷
题型:单选题 题类:常考题 难易度:普通
2016-2017学年吉林省吉林五十五中高二上学期期中化学试卷
①C(s)+O2(g)═CO2(g)△H1 C(s)+O2(g)═CO(g)△H2
②S(s)+O2(g)═SO2(g)△H1 S(g)+O2(g)═SO2(g)△H2
③2H2(g)+O2(g)═2H2O(l)△H1 2H2(g)+O2(g)═2H2O(g)△H2
④CaCO3(s)═CaO(s)+CO2(g)△H1 CaO(s)+H2O(l)═Ca(OH)2(s)△H2 .
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