CO(g)+Cl2(g)↔COCl(g)+Cl(g) . Kenetic studies indicate that the rate constant for the forward reaction,Kf is 1.38x10-28 M/s; for the reverse reaction kR= 9.3x 1010M/s( both rate constant at 25 oC. What is the value of the equilibrium constant at 25oC?