The relationship between Kp and KC is Kp=KC(RT)Δn ...(i) Here, Δn= (number of moles of product of gas) - (number of moles of reactant of gas) Kp= equilibrium constant at constant pressure Kc= equilibrium constant at constant concentration R= rate constant 2A(g)⇌B(g)+C(g) The value of Δn is =2−2=0 Put value of Δn in Eq. (i) we ger, Kr=Kc(RT)0 ⇒[Kp=KC]