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题型:单选题 题类:常考题 难易度:普通
安徽省青阳县第一中学2019-2020学年高二上学期化学9月月考试卷
⑵2H2 (g)+O2 (g)=2H2O(g);ΔH2 = b kJ/mol
⑶ H2 (g)+1/2O2 (g)=H2O(l);ΔH3 = c kJ/mol
⑷ 2H2 (g)+O2 (g)=2H2O(l);ΔH4 = d kJ/mol
则a、b、c、d的关系正确的是( )
①C(s)+ O2(g)═CO(g);△H1 C(s)+O2(g)═CO2(g);△H2
②S(g)+O2(g)═SO2(g);△H3 S(s)+O2(g)═SO2(g);△H4
③CaO(s)+H2O(l)═Ca(OH)2(s);△H5 CaCO3(s)═CaO(s)+CO2(g);△H6 .
2H2(g)+O2(g)=2H2O(g) ΔH=-a kJ·mol-1 ①
2H2(g)+O2(g)=2H2O(l) ΔH=-b kJ·mol-1 ②
H2(g)+1/2O2(g)=H2O(g) ΔH=-c kJ·mol-1 ③
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