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Question

When 1 mole H2O(g) and 1 mole CO(g) are heated at 1000C in a closed vessel of 5 litre, it was found that 40% of H2O react at equilibrium according to H2O(g)+CO(g)H2(g)+CO2(g). Find KC of the reaction.

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Solution

The given reaction is :-
H2O(g)+CO(g)H2(g)+CO2(g)
Initial moles : 1 1 0 0
At eqm : (1α) (1α) α α (let)
Now, given that, at equilibrium,
40% of H2O has reacted α=0.4
At eqm, no. of moles of H2O =0.6
No. of moles of H2=4
No. of moles of CO2=0.4
So, KC=[H2][CO2][H2O][CO]=0.4×0.40.6×0.6=49=0.44

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