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A.
N2H4(g)+
O2 (g)====
N2 (g)+ H2O (g)；ΔH=+267kJ／mol
B.N2H4(g)+O2 (g)+====N2(g)+2H2O (g)；ΔH=-133.5 kJ／mol
C.N2H4(g)+O2 (g)==== N2 (g)+2H2O (g)；ΔH=+534 kJ／mol
D.N2H4(g)+O2 (g)==== N2 (g)+2H2O (g)；ΔH=-534 kJ／mol
查看习题详情和答案>>N2H4是一种高效清洁的火箭燃料。0.25 mol N2H4(g)完全燃烧生成氮气和气态水时，放出133.5 kJ热量。则下列热化学方程式中正确的是( )
A．1/2 N2H4(g)＋1/2O2(g)===1/2 N2(g)＋H2O(g) ΔH＝＋267 kJ·mol－1
B．N2H4(g)＋O2(g)===N2(g)＋2H2O(l) ΔH＝－133.5 kJ·mol－1
C．N2H4(g)＋O2(g)===N2(g)＋2H2O(g) ΔH＝＋534 kJ·mol－1
D．N2H4(g)＋O2(g)===N2(g)＋2H2O(g) ΔH＝－534 kJ·mol－1
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N2H4是一种高效清洁的火箭燃料。0.25 mol N2H4(g)完全燃烧生成氮气和气态水时，
放出133.5 kJ热量。则下列热化学方程式中正确的是( )
A．
N2H4(g)＋O2(g)====N2(g)＋H2O(g)；ΔH=＋267
kJ·mol－1
B．N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =－534 kJ·mol－1
C．N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =＋534 kJ·mol－1
D．N2H4(g)＋O2(g)====N2(g)＋2H2O(l)；ΔH =－133.5 kJ·mol－1
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