Q. For the reaction $H_{2}(g) + I_{2}(g) \rightleftharpoons 2HI(g)$, the equilibrium constants expressed in terms of concentrations $K_{c}$ and in terms of partial pressure $K_{p}$, are related as
A) $K_{p} = K_{c}(RT)^{2}$
B) $K_{p} = K_{c}(RT)^{- 2}$
C) $K_{p} = K_{c}$
D) $K_{c} = K_{p}(RT)$
Explanation
(c)
For the reaction.
$H_{2}(g) + I_{2}(g) \rightleftharpoons 2HI(g)$
$K_{p} = K_{c}(RT)^{\mathrm{\Delta}n}$
$\mathrm{\Delta}n = 2 - 2 = 0$
so, $K_{p} = K_{c}$
(where, $K_{p}and\ K_{c}$ are equilibrium constants in terms of partial pressures and concentrations.)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.