1.
(2022高二下·玉门期中)
肼(N2H4)是火箭发动机的燃料，它与N2O4反应生成氮气和水蒸气。已知：
①N2(g)＋2O2(g)=N2O4(g)ΔH＝＋8.7 kJ·mol－1
②N2H4(g)＋O2(g)=N2(g)＋2H2O(g)ΔH＝－534.0 kJ·mol－1
下列表示肼跟N2O4反应的热化学方程式正确的是
A . 2N2H4(g)＋N2O4(g)=3N2(g)＋4H2O(g) ΔH＝－542.7 kJ·mol－1
B . 2N2H4(g)＋N2O4(g)=3N2(g)＋4H2O(g) ΔH＝－1 076.7 kJ·mol－1
C . N2H4(g)＋
N2O4(g)=
N2(g)＋2H2O(g) ΔH＝－1 076.7 kJ·mol－1
D . 2N2H4(g)＋N2O4(g)=3N2(g)＋4H2O(g) ΔH＝－1 059.3 kJ·mol－1
