In the equilibrium $N_{2} + 3 H_{2} ⇌ 2 {N H}_{3}$ , the maximum yield of ${N H}_{3}$ will be obtained with the process having:

low pressure and high pressure

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low pressure and low temperature

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high pressure and low temperature

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high pressure and high temperature

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Solution

The correct option is D high pressure and low temperature
In the equilibrium $N_{2} + 3 H_{2} ⇌ 2 {N H}_{3} +$ 92.2 kJ, the maximum yield of ${N H}_{3}$ will be obtained with the process having high pressure and low temperature.
The forward reaction takes place with decrease in number of moles (4 to 2). With increase in pressure, forward reaction is favoured and yield of ammonia increases.
The forward reaction is exothermic (heat is evolved during reaction) and is favoured by decrease in temperature.

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In the equilibrium N2+3H2⇌2NH3, the maximum yield of NH3 will be obtained with the process having:

In the equilibrium $N_{2} + 3 H_{2} ⇌ 2 {N H}_{3}$ , the maximum yield of ${N H}_{3}$ will be obtained with the process having: