Question

$log\frac{K_p}{K_c}+logRT=0$ is true relationship for the following reaction :

• A. $P{Cl}_5\rightleftharpoons P{Cl}_3+{Cl}_2$
• B. $2S{O}_3\rightleftharpoons 2S{O}_2+O_2$
• C. $N_2+3H_2\rightleftharpoons 2N{H}_3$
• D. None of these

Answer 1

The correct option is D None of these

$K_p=K_c(RT{)}^{\Delta n}$

$log{K}_p=log{K}_c+\Delta nlogRT$

$log\frac{K_p}{K_c}=\Delta nlogRT$

When $\Delta n=-1$

$log\frac{K_p}{K_c}+logRT=0$

For the dissociation of $PC{l}_5,\Delta n=1+1-1=1$

For the dissociation of $S{O}_3,\Delta n=2+1-2=1$

For the formation of ammonia, $\Delta n=2-1-3=-2$

For none of the given reactions, $\Delta n=-1$

Hence the given relationship is not true for any of the given reactions.