A. 2N2H4(g) + N2O4(g) ＝ 3N2(g) + 4H2O(g), △H＝?1076.7 kJ/mol 【查看更多】

 

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肼（N2H4）是火箭發(fā)動機(jī)的一種燃料，反應(yīng)時N2O4為氧化劑，反應(yīng)生成N2和水蒸氣。已知：N2(g) + 2O2(g)＝N2O4(g)；  △H＝+ 8.7kJ/mol
  N2H4(g) + O2(g)＝N2(g) + 2H2O(g)； △H＝534 kJ/mol
下列表示肼和N2O4反應(yīng)的熱化學(xué)方程式，正確的是                     
  A. 2N2H4(g) + N2O4(g) ＝ 3N2(g) + 4H2O(g)；  △H＝1076.7 kJ/mol
  B. N2H4(g) + 1/2N2O4(g) ＝3/2N2(g) + 2H2O(g)； △H＝1076.7 kJ/mol
  C. 2N2H4(g) + N2O4(g) ＝ 3N2(g) + 4H2O(g)；  △H＝542.7 kJ/mol
  D. 2N2H4(g) + N2O4(g) ＝ 3N2(g) + 4H2O(g)；  △H＝1059.3 kJ/mol

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肼(N2H4)是火箭發(fā)動機(jī)的一種燃料，反應(yīng)時N2O4為氧化劑，生成N2和H2O(g)．已知：N2(g)＋2O2(g)＝N2O4(g)；△H＝＋8.7 kJ·mol－1

N2H4(g)＋O2(g)＝N2(g)＋2H2O(g)；△H＝－534.0 kJ·mol－1

下列表示肼跟N2O4反應(yīng)的熱化學(xué)反應(yīng)方程式，正確的是

[　　]

A．

2N2H4(g)＋N2O4(g)＝3N2(g)＋4H2O(g)；△H＝－542.7 kJ·mol－1

B．

2N2H4(g)＋N2O4(g)＝3N2(g)＋4H2O(g)；△H＝－1059.3 kJ·mol－1

C．

N2H4(g)＋N2O4(g)＝N2(g)＋2H2O(g)；△H＝－1076.7 kJ·mol－1

D．

2N2H4(g)＋N2O4(g)＝3N2(g)＋4H2O(g)；△H＝－1076.7 kJ.mol－1

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