Ammonia Chemical Bonding Worksheet Page 12
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28Q7.
The Haber process is used to make ammonia (NH
) which is an important substance.
3
The equation below shows the reaction in which ammonia is formed.
N
+ 3H
2NH
+
Heat
(g)
(g)
(g)
2
2
3
The graph below shows how temperature and pressure affect how much ammonia is produced
in the reaction.
In the industrial process a mixture of nitrogen and hydrogen is passed over iron at a temperature
of about 450 °C and 200 atmospheres pressure.
(a)
Use the graph to find the percentage of ammonia present when the temperature and
pressure are 450 °C and 200 atmospheres.
................................................................ %
(2)
(b)
Explain why the nitrogen and hydrogen mixture is passed over iron.
.....................................................................................................................................
.....................................................................................................................................
(2)
Page 12 of 28
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