Question

For the reaction $AB\left(g\right)\rightleftharpoons A\left(g\right)+B\left(g\right)$, Ag is 33% dissociated at a total pressure of p. Then:

• A. $p=K_p$
• B. $p=4K_p$
• C. $p=3K_p$
• D. $p=8K_p$

Answer 1

The correct option is D $p=8K_p$

$AB\left(g\right)\rightleftharpoons A\left(g\right)+B\left(g\right)$

x o o

$0\cdot 670\cdot 33x0\cdot 33x$ (At equilibrium)

Total pressure $=1\cdot 33x=p=\frac{4x}{3}$

$K_p=\frac{(0\cdot 33x{)}^2}{0\cdot 67x}=\frac{\frac{x^2}{9}}{\frac{2x}{3}}=\frac{x}{6}=\frac{3p}{4\left(6\right)}=\frac{P}{8}$

$\therefore [P=8K_p]$