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Asalam-o-Alaikum!I've read in E.N.Ramsden that H2+I212HI and Kc=[HI]2/[H] But in a cambridge course book I've read this equation(Attachment). Which one is correct and in case both are correct then Kc is equal to its reciprocal. And if it is not then how can be the Kc different for a reversible reaction in same conditions?
look, when the equation is H2+I212HI then the expression for Kc is [HI]^2/[H2] x [I2]
BUT when the equation is 2HI1H2+I2 then the expression for Kc is [H2] x [I2]/[HI]^2
because the products ALWAYS go on the top and the reactants always go at the bottom. Therefore the E.N.Ramsden book was wrong and the Cambridge course book was right. I don't think that the Kc values for both these equations have a relationship with each other and they probably wouldn't ask you such a question so no need of worrying.