the haber process

gcse revision document on the haber process, detailed decription including equilibrium - contains all the information that you need to know for the addtional chemistry exam 

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  • Created by: Aimee
  • Created on: 27-04-11 18:48
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By Aimee
The Haber Process
The Haber Process combines nitrogen from the air with
hydrogen derived mainly from natural gas (methane) into
ammonia. The reaction is reversible and the forward reaction
is exothermic.
EQUILIBRIUM ­ in a closed reaction (where no reactants can
escape) the reaction will eventually reach equilibrium which
is where the rate of forward reaction is the same as the
backward reaction. Think about it like this, if you walked
on an escalator but in the opposite way to how the escalator
was going at exactly the same pace the escalator was moving.
Well, the Haber process is a closed reaction so eventually
reaches a state of equilibrium.
By altering certain things you can move the position of
equilibrium to produce more product and less reactants...

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By Aimee
Decreasing the temperature will make more of the
product because the forward reaction is exothermic.
(Please note that if the forward reaction in a reaction
is endothermic, then increasing the temperature will
increase the yield.)
For the Haber process, increasing the pressure will
result in more products. (This is because when you
raise the pressure, it will encourage the reaction
which produces less volume ­ fewer molecules. And if
you lower the pressure, it will encourage the reaction
which produces more volume.…read more

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