Ammonia Chemical Bonding Worksheet Page 17
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28M1.
(a)
(i)
(gas X) nitrogen/N
2
1
(gas Y) hydrogen/H
2
1
(ii)
cooled
1
(b)
any two from:
•
save materials/resources
•
save energy/fuels
•
reduce costs
•
reduce waste
2
(c)
(i)
low
1
high
1
(ii)
40(%)
1
(iii)
any two from:
•
using these conditions the yield is still high
•
higher pressures would increase yield but energy
costs would be higher
or
higher pressures would increase yield but would
make the plant expensive to build
•
the temperature of 450 °C would not need a
lot of energy
or
at 450 °C the reaction would be faster than at lower
temperatures
2
[10]
Page 17 of 28
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