Question

For the equilibrium, $PC{l}_5\leftrightharpoons PC{l}_3+C{l}_2$; $K_c=\frac{{\alpha }^2}{1-\alpha }V$, temperature remaining constant. Then:

• A. $K_c$ will decrease with increase in volume
• B. $K_c$ will increase with increase in volume
• C. $K_c$ will not change with the change in volume
• D. $K_c$ may increase or decrease with the change in volume depending upon its numerical value.

Answer 1

The correct option is C $K_c$ will not change with the change in volume

The magnitude of the equilibrium constant is not affected by the changes in concentrations of reactants and products, pressure and volume. Thus, when volume is changed, the value of the equilibrium constant $K_c$ is unaffected.