Question

For the equilibrium reaction, $A_{\left(g\right)}+2B_{\left(g\right)}\rightleftharpoons C_{\left(g\right)}+D_{\left(g\right)}$, the equilibrium constant $\left(K_c\right)$ is given by the expression:

• A. $K_c=\frac{\left[C\right]\left[D\right]}{\left[A\right]\left[B\right]}$
• B. $K_c=\frac{\left[C\right][D{]}^2}{\left[A\right]\left[B\right]}$
• C. $K_c=\frac{\left[A\right][B{]}^2}{\left[C\right]\left[D\right]}$
• D. $K_c=\frac{\left[C\right]\left[D\right]}{\left[A\right][B{]}^2}$

Answer 1

The correct option is D $K_c=\frac{\left[C\right]\left[D\right]}{\left[A\right][B{]}^2}$

For the given reaction; $A+2B\rightleftharpoons C+D$ the equilibrium constant is given as:

$K_c=\frac{\left[C\right]\left[D\right]}{\left[A\right][B{]}^2}$