试题 试卷
题型:单选题 题类:常考题 难易度:普通
下列说法正确的是( )
①C3H8(g)=C3H6(g)+H2(g)△H=+b kJ/mol
②2C3H6(g)+9O2(g)=6CO2(g)+6H2O(l)△H=﹣c kJ/mol
③2H2(g)+O2(g)=2H2O(l)△H=﹣d kJ/mol (b、c、d均为正值)则正确的( )
①Fe2O3(s)+3CO(g)═2Fe(s)+3CO2(g)△H1=﹣25kJ•mol﹣1;
②3Fe2O3(s)+CO(g)═2Fe3O4(s)+CO2(g)△H2=﹣47kJ•mol﹣1;
③Fe3O4(s)+CO(g)═3FeO(s)+CO2(g)△H3=+19kJ•mol﹣1 .
写出FeO(s)被CO还原成Fe和CO2的热化学方程式{#blank#}1{#/blank#}.
Ⅰ.COS(g)+H2(g) H2S(g)+CO(g) △Hl=-17kJ/mol;
Ⅱ.COS(g)+H2O(g) H2S(g)+CO2(g) △H2=-35kJ/mol。
回答下列问题:
①太阳光催化分解水制氢:2H2O(l)=2H2(g)+O2(g) ΔH1=+571.6 kJ·mol-1
②焦炭与水反应制氢:C(s)+H2O(g)= CO(g)+H2(g) ΔH2=+131.3 kJ·mol-1
③甲烷与水反应制氢:CH4(g)+H2O(g)=CO(g)+3H2(g)ΔH3=+206.1 kJ·mol-1
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