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# Mention the conditions required to maximise the yield of ammonia.

7.4     Mention the conditions required to maximise the yield of ammonia.

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Ammonia is produced by Haber's process-

$N_{2}+3H_{2} \overset{700k}{\leftrightharpoons} 2NH_{3}\:\:\:\:\: \Delta H^{o}=-46.1KJmol^{-1}$

The maximum yield conditions for the production of ammonia are-

1. pressure = $200 \:atm \:or\:200\times 10^5 Pa$,
2. Temperature of around 700 K
3. catalyst = Iron oxide
4. Promotor= small amounts of $K_2O$ and $Al_2O_3$ to increase the rate of attainment of equilibrium.

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