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题型:单选题 题类:常考题 难易度:普通
人教版化学高二选修4第一章第三节化学反应热的计算同步练习
3H2(g)+Fe2O3(s)=2Fe(s)+3H2O(g)△H2
2Fe(s)+ O2(g)=Fe2O3(s)△H3
2Al(s)+ O2(g)=Al2O3(s)△H4
2Al(s)+Fe2O3(s)=Al2O3(s)+2Fe(s)△H5
下列关于上述反应焓变的判断正确的是( )
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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