Chemical Engineering - Chemical Reaction Engineering - Discussion

The rate expression for a heterogenous catalytic reaction is given by, - r_A = K.K_A P_A(1 + K_A.P_A + K_R.P_R), where K is surface reaction rate constant and K_A and K_R are absorption equilibrium constants of A and R respectively. If K_R P_R >> (1 + K_A P_A), the apparent activation energy E_A is equal to (given E is the activation energy for the reaction and ΔH_R and ΔH_A are the activation energies of adsorption of R and A)