Question

Two samples of HI each of 5 g was taken separately in two vessels of volume 5 lit and 10 lit respectively at ${27}^{\circ }C$. The extent of dissociation of HI will be:

• A. More in 5 litre vessel
• B. More in 10 litre vessel
• C. Equal in both vessels
• D. Can't be predicted

Answer 1

The correct option is C Equal in both vessels

The equilibrium reaction is $2HI\left(g\right)\iff H_2\left(g\right)+I_2\left(g\right)$.

In this reaction, the value of $\Delta n$ is $(1+1)-2=0$.

The equilibrium of such a reaction is not affected by the change in pressure. Thus the extent of dissociation of HI will be the same in 5 L vessel and 10 L vessel.

Hence, option C is correct.