Question

Final pressure is higher than initial pressure of a container filled with an ideal gas at constant temperature. What will be the value of equilibrium constant?

• A. $K=1.0$
• B. $K=10.0$
• C. $K>1.0$
• D. $K<1.0$

Answer 1

The correct option is D $K<1.0$

No. of gaseous moles increases as pressure increases at equilibrium for the reaction.

$\underset{1(1-\alpha )}{P}\left(g\right)\leftrightharpoons \underset{0\alpha }{Q\left(g\right)}+\underset{0\alpha }{R\left(g\right)}$
$K_P=\frac{{\alpha }^2\times P_{eq}}{1-{\alpha }^2}$
For $\alpha <1,P_{eqm}<1[\because P_{initial}<P_{final}]$
$\Rightarrow K_P<1$
Option D is correct.