The temperature at which KC=20.4 and Kρ=600.1, is 354K. Given reaction is, N2O4(g)⇌2NO2(g) Given values are : Kρ=600.1 KC=20.4 ∆ng= number of moles of product - number of moles of reactant Using relation between Kp and KC=2−1=1 where R is the gas constant =0.083Latm/Kmol ∆ng=1 (for given reaction) On putting given values, we will get 600.1=20.4(RT)1⇒T≈354K