The formation of ammonia from its constituent | vedclass

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Question

(D) Consider the reaction for the formation of ammonia from nitrogen and hydrogen by Haber's process:
$N_{2(g)} + 3H_{2(g)} \rightleftharpoons 2N

Vedclass · Accepted Answer

Backward reaction is favored

Vedclass · Answer

(D) Consider the reaction for the formation of ammonia from nitrogen and hydrogen by Haber's process:
$N_{2(g)} + 3H_{2(g)} \rightleftharpoons 2NH_{3(g)}; \Delta H = -92.4 \ kJ$
The forward reaction is exothermic $(\Delta H < 0)$,while the reverse reaction is endothermic $(\Delta H > 0)$.
According to Le Chatelier's principle,if the temperature of a system at equilibrium is increased,the system will shift in the direction that absorbs heat to counteract the change.
Therefore,an increase in temperature favors the endothermic (backward) reaction.
As a result,the backward reaction is favored,leading to a decrease in the yield of ammonia.

The formation of ammonia from its constituent elements is an exothermic reaction. The effect of increasing temperature on the reaction equilibrium is

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