The effect of temperature on a system in equilibrium

The reaction:

N₂ + 3H₂ 2NH₃

is exothermic, while

2NH₃ N₂ + 3H₂

is endothermic.

According to Le Chatelier's Principle the equation will move to alter the stress. So an increase in temperature will favour the endothermic reaction (in this case the backward one) while a decrease will favour the exothermic one(in this case, the forward one).

Decreasing the temperature in this case caused more NH₃ to be produced. Increasing the temperature will cause more N₂ and H₂ to be produced.

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