Ammonia Chemical Bonding Worksheet Page 16
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28(d)
The equation for the Haber Process is this:
N
+
3H
2NH
2
2
3
At equilibrium, nitrogen, hydrogen and ammonia are present in the reactor.
(i)
What is meant by ‘equilibrium’?
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(1)
(ii)
Explain, as fully as you can, why:
•
the yield of ammonia decreases with increase in temperature,
•
despite this fact, a comparatively high temperature of 4500C is used for the
industrial process,
•
iron powder is added to the reactor.
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(4)
(Total 9 marks)
Page 16 of 28
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