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One mole of `H_(2)O` and one mole of CO are taken in a 10 litre vessel and heated at 725 K. At equilibrium 40% of water (by mass) reacts with CO according to the equation : `H_(2) O (g) + CO(g) hArr H_(2)(g) + CO_(2) (g) ` calculate the equilibrium constant for the reaction.

Answer» ` [H_(2) O ] = (1 - 0*40 )/10 "mol"L^(-1) = 0*06 "mol"L^(-1) , [CO] = 0 *06 "mol" L^(-1)`
` [H_(2)] = (0*4)/10 "mol" L^(-1) = 0*04 "mol" L^(-1) , [CO_(2) ] = 0*04 "mol" L^(-1) `
` K = ([H_(2) ] [ CO_(2)] )/([H_(2)O][CO])=(0*04 xx0*04 )/(0*06 xx 0*06)= 0*444 .`


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