The manufacturing of ammonia by Haber's process involves the reaction with ΔH=−22.4kcal. When temperature is increased, the equilibrium is:
A
shifted to the right
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B
unaffected
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C
shifted to the left
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D
shifted first to right then to left
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Solution
The correct option is B shifted to the left The negative value of the enthalpy of the reaction indicates that the formation of NH3 is an exothermic process.
When the temperature is increased, the reaction will proceed in the backward direction so as to absorb heat and nullify the effect of increasing temperature. In other words, the equilibrium will shift to left.