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题型:单选题 题类:常考题 难易度:普通
湖南省衡阳市第八中学2018-2019学年高二上学期化学12月月考试卷
Cu(s)+Cu2+(aq) 2Cu+(aq) ΔH1=a kJ·mol-1
Cl—(aq)+Cu+(aq) CuCl(s) ΔH2=b kJ·mol-1
实验测得电解液pH对溶液中残留c(Cl-)的影响如图所示。下列说法正确的是( )
Cl2(g)+H2(g)=2HCl(g )△H2
2Cl2(g)+2H2O(g)=4HCl(g)+O2(g)△H3
则△H3与△H1和△H2间的关系正确的是( )
①(V)2NO(g)+O2(g) 2NO2(g) ∆H1 =-114.0 kJ·mol-1
②(H)CO(NH2)2(aq) + H2O (l) 2NH3(g)+CO2(g) ∆H2 = 119.2kJ·mol-1
③(R)2NH3(g)+NO(g)+NO2(g) = 2N2(g)+3H2O(g) ∆H3=-759.0kJ·mol-1
④(O)4NH3(g)+3O2(g)=2N2(g) + 6H2O(g) ∆H4 =-1530.0 kJ·mol-1
下列说法正确的是( )
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