Name the principle which helps better yield of ammonia.

Asked by tarinchpani | 13th Jan, 2016, 10:04: PM

Expert Answer:

  • Since the reaction is exothermic, hence low temperature will favour the synthesis. In practice the optimum temperature has been found to be in the range of 450-500OC.
  • Four volumes of reactants produce two volumes of product; hence high pressure favours the formation of ammonia. The optimum pressure is found to be 200 to 900 atm.
  • Finely divided catalyst like Fe can improve the speed of the reaction and a promoter like molybdenum is used to increase the efficiency of the catalyst.
  • Since the reaction is exothermic, external heating is not required after the reactants are initially heated.


Answered by Vaibhav Chavan | 14th Jan, 2016, 04:24: PM