One mole of `H_(2)` and mole of `I_(2)` are allowed to attain equilibrium in 1 lit container . If the equilibrium mixture contains 0.4 mole of HI . Calculate the equilibrium constant .

Explanation

Given data : `[H_(2)] = 1` mole , `[I_(2)] = 1` mole
At equilibrium , [HI] = 0.4 mole `K_(C)` = ?
`H_(2) (g) + I_(2) (g) hArr 2HI (g)`

`therefore " " K_(C) = ([HI]^(2))/([H_(2)] [I_(2)]) = (0.4 xx 0.4)/(0.8 xx 0.8) = 0.25`