Haber Process

Brief description of Haber Process, it's purpose, conditions and other details!

  • Created by: Angharad
  • Created on: 21-11-11 19:36

Haber Process

The Haber Process makes Ammonia due to increasing demand for food in the 19th Century with a growing population. 


Nitrogen (from air) + Hydrogen = Ammonia


  • 200 atmospheric pressure
  • 450 Celsuis temp
  • Yield = 15% but leftover N2 + H2 are recyled
  • At 200 pressure yield is acceptable as no special plant is needed
  • Temperature is 450 Celsuis as reversible reactions are endo and exothermic so reaction occurs at acceptable rates
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Haber Process

The Haber Process is a reversible reaction which occurs in both directions, the reaction reaches a dynamic equilibruim

Haber Process = Exothermic as heat is given out 

  • Exothermic = Low temperature
  • Endothermic = High temperature


Powdered Iron Catalyst - Increases rate of reaction without increasing temperature because that would lower the yield. 

Spare heat energy is recycled to maintain temperature of plant


  • Fertiliser
  • Explosives
  • Nylon and Nitric Acid
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Haber Process

Atom Economy = 100% but Yield is 15% 

Ammonia is an Alkali and can be neutralised by acids to make ammonia salts which an be used as fertilisers

e.g. Ammonium Nitrate 

NH3 +HNO3 ---- NH4NO3

All ammonuim compounds contain NH4 

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