Question

For reaction, $2NO{Cl}_{\left(g\right)}\rightleftharpoons 2{NO}_{\left(g\right)}+{Cl}_{2\left(g\right)};K_c$ at ${427}^{o}C$ is $3\times {10}^{-6}L{mol}^{-1}$. The value of $K_p$ is nearly:

• A. $7.50\times {10}^{-5}$
• B. $2.50\times {10}^{-5}$
• C. $2.50\times {10}^{-4}$
• D. $1.75\times {10}^{-4}$

Answer 1

The correct option is D $1.75\times {10}^{-4}$

$K_p=K_c{\left[RT\right]}^{\Delta n}$

$\Delta n=1$

$K_p=3\times {10}^{-6}$$\times {(0.082\times 700)}^1$

$=3\times {10}^{-6}\times 0.082\times 7\times {10}^2=1.75\times {10}^{-4}$

Hence, option D is correct