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题型:单选题 题类:常考题 难易度:困难

重庆市第八中学2017-2018学年高一下学期化学期末考试试卷

已知:①4NH3(g)+5O2(g)=4NO(g)+6H2O(g)△H1=-akJ·mol-1

②4NH3(g)+3O2(g)=2N2(g)+6H2O(g)△H2=-bkJ·mol-1

③H2(g)+1/2O2(g)=H2O(g)△H3=-ckJ·mol-1

④H2(g)+1/2O2(g)=H2O(l)△H4=-dkJ·mol-1

下列叙述正确的是(    )

A、由上述热化学方程式可知△H3<△H4 B、H2的燃烧热为dkJ·mol-1 C、4NH3(g)+4O2(g)=2NO(g)+N2(g)+6H2O(g)△H=(-a-b)kJ·mol-1 D、4NH3(g) 2N2(g)+6H2(g)△H=(6d-b)kJ·mol-1
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