The rate expression for a heterogenous catalytic reaction is given by, – McqOptions

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1.	The rate expression for a heterogenous 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)
A.	E
B.	E + ΔHA
C.	E + ΔHA - ΔHR)
D.	ΔHA + ΔHR
Answer» D. ΔHA + ΔHR

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