Q. In chemical equilibrium, the value of $\mathrm{\Delta}n$ (number of molecules of products – number of molecules of reactants), is negative, then the relationship between $K_{p}and\ K_{c}$ will be
A) $K_{p} - K_{c} = 0$
B) $K_{p} = K_{c}(RT)^{+ \mathrm{\Delta}n}$
C) $K_{p} = K_{c}(RT)^{- \mathrm{\Delta}n}$
D) $K_{p} = \frac{1}{K_{c}}$
Explanation
(c)
Relation between $K_{p}\ and\ K_{c}\ is\ K_{p} = K_{c}(RT)^{\mathrm{\Delta}n}$
Here , $\mathrm{\Delta}n =$ number of moles of gaseous products – number of moles of gaseous reactants
If $\mathrm{\Delta}n$ is negative, then the relationship between $K_{p}\ and\ K_{c}will\ be$
$K_{p} = K_{c}(RT)^{- \mathrm{\Delta}n}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.