Haber Process and Conditions
- Created by: Lizzi
- Created on: 19-05-13 08:41
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- Haber method & CONDITIONS
- Chemical Equilibrium
- In a reversible reaction, the products can then be used to make the reactants
- Reached when forward and reverse rates are equal
- Changing conditions can alter the amounts of both the products and the reactants
- Altering Conditions
- Changing pressure:
- Increase will favour the side with the least number of molecules
- Decrease will favour the side with the most molecules
- Changing temp.:
- Increase favours the endothermic reaction (takes in heat/ energy)
- Decrease favours the exothermic side (gives out heat/ energy)
- Changing pressure:
- Haber Process
- Makes ammonia (used to make fertilisers and other chems.)
- Ammonia is made from hydrogen and nitrogen
- Conditions are chosen to give a quick, reasonable ammonia yield
- Any unreacted N and H are recycled
- Conditions/ Econimics
- Uses about 200 atmospheres of pressure
- Higher pressure would produce more ammonia, but it's too expensive
- Temp. of about 450 degrees C is used
- Lower temp. would produce more ammonia, but takes too long
- Chemical Equilibrium
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