下列事实不能应用平衡移动原理来解释的是(    )A.向H2S水溶液中加

下列事实不能应用平衡移动原理来解释的是(    )

A.向H2S水溶液中加入NaOH有利于S2-增多

B.加入催化剂有利于氨的氧化反应

C.高压对合成氨有利

D.500 ℃左右比室温更有利于合成氨的反应

答案

解析:B项中加入催化剂不能使化学平衡发生移动,而且该反应不是可逆反应;D项中所指的温度是合成氨的适宜温度,在500 ℃的高温下会使平衡左移,不利于氨的合成,但500 ℃是催化剂活性最大时的温度,能加快反应速率,提高单位时间内氨的产量,但是这和平衡移动原理无关,所以D项不能用平衡移动原理来解释。

答案:BD

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