题目内容

The word "about-face" (Line 1, Para 3) most probably means

A. loss of good will
B. increase of hostility
C. change of attitude
D. enhancement of dignity

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We learn from Para.1 that Gilbert’s appointment has

A. incurred criticism.
B. raised suspicion.
C. received acclaim.
D. aroused curiosity.

一定温度下,将1 mol SO3放入1 L的反应容器内,当反应2SO3(g) = 2SO2(g) + O2(g)达到平衡时,容器内有0.6 mol SO2,则反应平衡常数是

A. 0.36
B. 0.45
C. 0.68
D. 0.54

在反应A2(g) + 2B2(g) = 2AB2(g)中,DrHmØ为负值,采用下述哪种方法可使平衡向左移动

A. 降低压力,增加温度
B. 增加压力,降低温度
C. 降低压力和温度
D. 增加压力和温度

已知某温度时,下列反应的平衡常数H2(g) + S(s) = H2S(g) KlØS(s) + O2(g) = SO2(g) K2Ø则反应H2(g) + SO2(g) = O2(g) + H2S (g)的平衡常数为

A. K1Ø + K2Ø
B. K1Ø/K2Ø
C. K1Ø-K2Ø
D. K2Ø/K1Ø