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题文

2010年10月1日,我国在西昌卫星发射中心成功发射“嫦娥二号”。嫦娥二号火箭推进器以联氨(N2H4)为燃料、过氧化氢为助燃剂。已知下列各物质反应的热化学方程式为
N2H4(g)+O2(g)=N2(g)+2H2O(g);ΔH1=-533.23 kJ·mol-1
H2O(g)=H2O(l);ΔH2=-44 kJ·mol1
2H2O2(l)=2H2O(l)+O2(g);ΔH3=-196.4 kJ·mol1
则联氨与过氧化氢反应的热化学方程式可表示为(  )

A.N2H4(g)+2H2O2(l)=N2(g)+4H2O(l);ΔH=+817.63 kJ·mol1
B.N2H4(g)+2H2O2(l)=N2(g)+4H2O(g);ΔH=-641.63 kJ·mol1
C.N2H4(g)+2H2O2(l)=N2(g)+4H2O(l);ΔH=-641.63 kJ·mol1
D.N2H4(g)+2H2O2(l)=N2(g)+4H2O(g);ΔH=-817.63 kJ·mol1
科目 化学   题型 选择题   难度 中等
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