Concept explainers
(a)
Interpretation:
The effect of temperature of containment vessel on increasing pressure above 200atm in the Haber process is to be written.
Concept introduction:
This is based on concept of equilibrium and Le-Chatlier’s principle.
According to Le-Chatlier’s principle,
Exothermic reactions are favored by decrease in temperature and endothermic reactions are favored by increase in temperature.

Answer to Problem 119A
Temperature of containment vessel will increase on increasing pressure above 200atm.
Explanation of Solution
Haber process is exothermic in nature. On increasing pressure, equilibrium shifts in forward direction. Therefore temperature will rise.
(b)
Interpretation:
The effect of lowering of temperature below 450°C on amount of time required to produce ammonia is to be explained.
Concept introduction:
This is based on concept of equilibrium and Le-Chatelier’s principle.
According to Le-Chatelier’s principle,
Exothermic reactions are favored by decrease in temperature and endothermic reactions are favored by increase in temperature.
(b)

Answer to Problem 119A
Lowering of temperature will increase the amount of time required to produce ammonia.
Explanation of Solution
Haber process is exothermic in nature. So decreasing the temperature shifts the reaction towards backward direction. Hence more time is required to produce ammonia.
Chapter 13 Solutions
Chemistry: Matter and Change
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