题目内容

长征二号捆绑式火箭推进剂以肼(N2H4)作为燃料,NO2作为氧化剂,反应生成N2和水蒸气。已知:N2(g) + 2O2(g) =2NO2(g);   △H=+67.7 kJ/mol

N2H4(g) + O2(g) = N2(g) + 2H2O(g);        △H=-534 kJ/mol

下列关于肼和NO2反应的热化学方程式中,正确的是

A.2N2H4(g) + 2NO2(g) = 3N2(g) + 4H2O(l);△H=-1135.7 kJ/mol

B.N2H4(g) + NO2(g) = 3/2N2(g) + 2H2O(g);△H=-567.85 kJ/mol

C.N2H4(g) + NO2(g) = 3/2N2(g) + 2H2O(l);△H=-1135.7 kJ/mol

D.2N2H4(g) + 2NO2(g) = 3N2(g) + 4H2O(g); △H=+1135.7 kJ/mol

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