Explain the effect of (a) pressure and (b) continuous removal of HI at constant temperature on the position of equilibrium of the following reaction: `H_(2)(g)+I_(2)(g)hArr2HI(g)`.

Explanation

(a) Pressure does not have any effect on the position of the equilibrium becaues the reaction is not associated with any volume change [Total no. of molecules of HI(g)=total no. of molecules of `H_(2)(g) and I_(2)(g)`], (b) If HI is removed continuously from the reaction system, then the equilibrium goes on shifting towards right, and finally the reaction moves towards completion.