Question

draw a graph to show how the yield of ammonia changes with the temperature and pressure​

Answer 1

Answer:

The effect of increasing temperature

When the temperature is increased, the position of equilibrium moves in the endothermic direction to reduce the temperature.

In the Haber process, the forwards reaction is exothermic, so the reverse reaction is endothermic.

N2(g) + 3H2(g) ⇌ 2NH3(g) (forwards reaction is exothermic)

This means that as the temperature is increased, the position of equilibrium moves to the left, and the yield of ammonia decreases.

It may seem sensible to use a very low temperature in order to maximise the yield of ammonia but lower temperatures reduce the rate of reaction. The temperature chosen is a compromise between yield and rate.

Explanation:

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