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为了向学生讲清,对同一个可逆反应,同一种催化剂能同等程度地改变正反应和逆反应的速度,使学生掌握温度和催化剂对化学平衡的影响的知识,可增补“氨催化分解的演示实验”. 一、原理氮跟氢是极不容易化合的,为了加快氮跟氢的合成反应速度,都采用以铁为主体的多成分催化剂——铁触媒。根据催化剂能够同样地加快正反应和逆反应的速度,铁触媒也能加快氨分解成氮气和氢气的反应速度。 N_2+3H_2(?)2NH_3+22.08千卡又因为合成氨的反应是放热反应,因此当压强
In order to explain to the students, the same catalyst can change the speed of positive and negative reactions to the same extent to the same extent, allowing students to grasp the knowledge of temperature and the influence of catalysts on chemical equilibrium. A demonstration experiment of catalytic decomposition of ammonia can be added. First, the principle of nitrogen and hydrogen is extremely difficult to combine, in order to speed up the synthesis of nitrogen and hydrogen reaction rate, using iron as the main multi-component catalyst - iron catalyst. According to the catalyst, the speed of the positive reaction and the reverse reaction can be similarly accelerated, and the iron catalyst can also accelerate the reaction rate of decomposition of ammonia into nitrogen and hydrogen. N_2+3H_2(?)2NH_3+22.08 kcal and because the reaction of ammonia synthesis is an exothermic reaction, so when the pressure