N2(g)+2O2(g)=N2O4(g),△H=+8.7kJ/mol, 查看更多

 

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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=534 kJ/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=1076.7 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是火箭发动机的燃料,反应时N2O4为氧化剂,生成氮气和水蒸气.已知:
N2(g)+2O2(g)=N2O4(g);△H=+8.7kJ/mol
N2H4(g)+O2(g)=N2(g)+2H2O(g);△H=-534.0kJ/mol
下列表示肼跟N2O4反应的热化学方程式,正确的是(  )

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肼N2H4是火箭发动机的燃料,反应时N2O4为氧化剂,生成氮气和水蒸气.已知:
N2(g)+2O2(g)=N2O4(g);△H=+8.7kJ/mol
N2H4(g)+O2(g)=N2(g)+2H2O(g);△H=-534.0kJ/mol
下列表示肼跟N2O4反应的热化学方程式,正确的是(  )
A.N2H4(g)+
1
2
N2O4(g)=
3
2
N2(g)+2H2O(g);△H=+538.35kJ/mol
B.2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g);△H=-1059.3kJ/mol
C.2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g);△H=-1076.7kJ/mol
D.N2H4(g)+
1
2
N2O4(g)=
3
2
N2(g)+2H2O(g);△H=-1076.7kJ/mol

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肼(N2H4)是火箭发动机的燃料,反应时N2O4为氧化剂,生成氮气和水蒸气。已知:

N2(g)+2O2(g)=N2O4(g);△H=+8.7kJ/mol 

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

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);△H=-542.7kJ/mol

       B.2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g);△H=-1059.3kJ/mol

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

       D.N2H4(g)+N2O4(g)=N2(g)+2H2O(g);△H=-1076.7kJ/mol

 

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肼(N2H4)是火箭发动机的燃料,反应时N2O4为氧化剂,生成氮气和水蒸气。已知:

N2(g)+2O2(g)=N2O4(g);△H=+8.7kJ/mol 

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

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);△H=-542.7kJ/mol

    B.2N2H4(g)+N2O4(g)=3N2(g)+4H2O(g);△H=-1059.3kJ/mol

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

    D.N2H4(g)+N2O4(g)=N2(g)+2H2O(g);△H=-1076.7kJ/mol

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1―5  CADAA    6―10 ACBDA    11―15 CDBCC    16―17 AC

18.AB   19.AC    20.BD

21.(1)①B     ②BDF    ③偏小

   (2)①酒精灯   

    ②在干燥器中冷却是为了防止空气中的H2O影响结果

    ③

    ④偏高

20081212

高温

   (3)①3MnO2+6KOH+KclO3===3K2MnO4+KCl+3H2O↑

②4H++3MnO2-4==MnO2+2MnO4+2H2O

   (4)①10.7%  ②0.25    ③3:2

   (5)

w.w.w.k.s.5.u.c.o.m

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