试题 试卷
题型:单选题 题类:常考题 难易度:普通
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 .
(1)H2( g )+O2 ( g )=H2O ( g )△H1=a kJ/mol
(2)2H2( g )+O2 ( g )=2H2O ( g )△H2=b kJ/mol
(3)H2( g )+O2 ( g )=H2O ( l )△H3=c kJ/mol
(4)2H2( g )+O2 ( g )=2H2O ( l )△H4=d kJ/mol
则a、b、c、d的关系正确的是( )
①C (s)+O2(g)═CO2(g)△H1 C(s)+ O2(g)═CO(g)△H2
③H2(g)+ O2(g)═H2O(l)△H1 2H2(g)+O2(g)═2H2O(l)△H2
④CaO(s)+H2O(l)═Ca(OH)2(s)△H1CaCO3(s)═CaO(s)+CO2(g)△H2 .
①C(s)+O2(g)=CO2(g)ΔH1;C(s)+O2(g)=CO(g)ΔH2
②S(s)+O2(g)=SO2(g)ΔH3;S(g)+O2(g)=SO2(g)ΔH4
③H2(g)+1/2O2(g)=H2O(l)ΔH5;2H2(g)+O2(g)=2H2O(l)ΔH6
④CaCO3(s)=CaO(s)+CO2(g)ΔH7;CaO(s)+H2O(l)=Ca(OH)2(s)ΔH8
⑴H2( g )+ O2( g ) = H2O ( g ) ΔH1= a kJ/mol
⑵2H2( g )+O2( g ) =2H2O ( g ) ΔH2= b kJ/mol
⑶H2( g )+ O2 ( g ) = H2O ( l ) ΔH3= c kJ/mol
⑷2H2( g )+O2( g ) =2H2O ( l ) ΔH4= dkJ/mol
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