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  4. 1 mole of HI is heated in a closed container of capacity of 2 L. At equilibrium half a mole of HI is dissociated. The equilibrium constant of the reaction is

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Q. $1$ mole of $HI$ is heated in a closed container of capacity of $2\, L$. At equilibrium half a mole of $HI$ is dissociated. The equilibrium constant of the reaction is

KCETKCET 2022Equilibrium

Solution:

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$ K _{ C } \frac{\left[ H _{2}\right]\left[ I _{2}\right]}{[ HI ]^{2}} $
$ K _{ C }= \frac{\frac{0.25 \times 0.25}{2}}{\frac{0.5 \times 0.5}{2}}$
$=\frac{1}{4}=0.25 $