1315Chemical EngineeringMedium
The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)?
AE + ΔHA
BΔHA + ΔHR
CE + ΔHA – ΔHR)
DE
Correct answer
C. E + ΔHA – ΔHR)
Explanation
The correct answer is E + ΔHA – ΔHR).