试题 试卷
题型:单选题 题类:常考题 难易度:普通
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( )
①C(s) + H2O(g)=CO(g)+H2(g) ΔH1=a kJ•mol-1
②CO(g) + H2O(g)=CO2(g)+H2(g) ΔH2=b kJ•mol-1
③CO2(g)+3H2(g)=CH3OH(g)+H2O(g) ΔH3 =c kJ•mol-1
④2CH3OH(g) =CH3OCH3(g)+H2O(g) ΔH4=d kJ•mol-1
①2H2O(g) = O2(g)+2H2(g) ΔH1
②Cl2(g)+H2(g) = 2HCl(g) ΔH2
③2Cl2(g)+2H2O(g) = 4HCl(g)+O2(g) ΔH3
则ΔH3与ΔH1、ΔH2间的关系正确的是 ( )
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