Question

On increasing the pressure, in which direction will the gas phase reaction proceed to re-establish equilibrium, is predicted by applying the LeChatelier's principle. Consider the reaction:
$N_{2\left(g\right)}+3H_{2\left(g\right)}\rightleftharpoons 2N{H}_{3\left(g\right)}$
Which of the following is correct, if the total pressure at which the equilibrium is established is increased without changing the temperature?

• A. K will remain same.
• B. K will decrease
• C. K will increase
• D. K will increase initially and decrease when pressure is very high.

Answer 1

The correct option is A K will remain same.

The given reaction is :-

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right)$

A/C to vart Hoff's eqn,

$\frac{dlnK}{dT}=\frac{△M}{{RT}^2}$

$K$ is dependent on temperature. As temperature remains constant at equilibrium, so $K$ will remain constant in the given conditions.