Question

Which of the following statement(s) is/are incorrect for the following equilibrium ?
$N{H}_{4}HS\left(s\right)+Heat\rightleftharpoons N{H}_3\left(g\right)+H_{2}S\left(g\right)$

• A. Addition of $N{H}_{4}HS\left(s\right)$ at equilibrium increases fthe concentration of $N{H}_3\left(g\right)$
• B. Addition of $N{H}_3\left(g\right)$ at equilibrium decreases the concentration of $H_{2}S\left(g\right)$
• C. $K_p$ is independent of the amount of $N{H}_{4}HS\left(s\right)$
• D. Increase in temperature changes the $K_p$ of this reaction

Answer 1

The correct option is A Addition of $N{H}_{4}HS\left(s\right)$ at equilibrium increases fthe concentration of $N{H}_3\left(g\right)$

A) $K_p=P_{N{H}_3}\times P_{H_{2}S}$
As $N{H}_{4}HS\left(s\right)$ is in solid phase then it is not considered in calculation of equilibrium constant.
So, addition of $N{H}_{4}HS\left(s\right)$ at equilibrium does not change the concentration of $N{H}_3\left(g\right)$.

B) Addition of the products at equilibrium shifts the equilibrium towards the left.

C)$K_p$ is dependent only on temperature.

D) As the reaction is endothermic, $K_p$ increases with temperature.