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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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