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The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 58.0 at some temperature.

Br2(g) + Cl2(g) ! 2 BrCl(g)
What is the value of the equilibrium constant for the following reaction?

BrCl(g) --->1/2 Br2(g) + 1/2 Cl2(g)