摘要：肼(N2H4)是火箭发动机的一种燃料.反应时N2O4为氧化剂.反应生成N2和水蒸气. 已知:N2(g)+2O2(g)===N2O4(g),△H= + 8.7kJ/mol N2H4(g)+O2(g)==N2(g)+2H2O(g),△H=-534kJ/mol 下列表示肼和N2O4反应的热化学方程式.正确的是 ( ) A. 2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g) △H= -1076.7KJ/mol B. N2H4(g)+1/2N2O4(g)=3/2N2(g)+2H2O(g) △H= -1076.7KJ/mol C. 2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g) △H= -542.7KJ/mol D.2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g) △H= -1059.3KJ/mol

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