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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
有關反應平衡常數的問題
May 28th 2013, 04:08

ammonia is prepareed industrially by the reaction
N2+3H2 = 2NH3

for the reaction. H=-92.2KJ and K (at 298K) =4.0*10^8.
when the temperautre of the reaction is increased to 773K,which of the following is true

a) k for the reaction will be larger at 773K than at 298K
b) at equilibrium, more NH3 is present at 773K than at 298K
c) product formation (at equilibrium) is not favored as the temperature is raised
d) the reaction of N2 with H2 to from ammonia is endothermic
e) none of the above is true

答案是C
但是我不明白
溫度升高反應不是吸熱方向(即往左)嗎
且溫度升高K值亦會有變化,為甚麼答案是C呢

我的概念還沒很清晰
尋求高人指點

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