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【简答题】
For centuries, Chinese people have been encouraged to fight back against crime and help out with emergencies in a selfless manner. However, should our youth sacrifice their lives in an emergency or is there a smarter way to deal with a crisis? Write a composition of about 400 words to state your view. In the first part of your essay you should state clearly your main argument, and in the second part you should support your argument with appropriate details. In the last part you should bring what you have written to a natural conclusion or make a summary. You should supply an appropriate title for your essay. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.
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【单选题】原电池Pt，H 2 （p）〡H 2 SO 4 （0.01m）〡O 2 （p），Pt在298K时，E=1.228V，并已知H 2 O（l）的生成热=-286.06kJ·mol -1 ，n=2，那么该电池的温度系数是（）
A.
-8.53×10 -4 V·K -1
B.
-4.97×10 -3 V·K -1
C.
4.12×10 -3 V·K -1
D.
8.53×10 -4 V·K -1
【单选题】已知 298K 时, N 2 (g) + 3H 2 (g) =2NH 3 (g) 的 D G ø = -33 kJ · mol -1 则 1/2NH 3 (g) = 1/2 N 2 (g) + 3/1 H 2 (g) 的 K P ø 为( )
A.
6.4 × 10 -4
B.
3.2 × 10 -4
C.
2.3 × 10 -3
D.
1.28 × 10 -3
【单选题】原电池 Pt,H 2 ( p ф )|H 2 SO 4 (0.01 m )|O 2 ( p ф ),Pt 在 298K 时, E = 1.228V ,并已知 H 2 O(l) 的生成热 Δ f H m = - 286.06 kJ·mol -1 , n = 2 ,那么该电池的温度系数是:( )
A.
(A) -8.53 × 10 -4 V·K -1 ；
B.
-4.97 × 10 -3 V·K -1 ；
C.
(C) 4.12 × 10 -3 V·K -1 ；
D.
(D) 8.53 × 10 -4 V·K -1 。
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