Question

For the following equilibrium, $N_2{O}_4\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$, $K_p$ is found to be equal to $K_c$. This is attained when the temperature is :

• A. $112K$
• B. $273K$
• C. $1K$
• D. $12.19K$

Answer 1

The correct option is D $12.19K$

The relationship between $K_p$ and $K_c$ is $K_p=K_c(RT{)}^{\Delta n}$.

But $\Delta n=1$ and $K_p=K_c$, the term $(RT{)}^{\Delta n}$ becomes $(RT{)}^1=1$.

Hence, $T=\frac{1}{R}=\frac{1}{0.0821}=12.19K$.