Chemical Reaction Engineering
The units of frequency factor in Arhenious equation

Are the same as those of the rate constant
Are cycles per unit time
Depend on the order of the reaction
Depend on temperature, pressure etc. of the reaction

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Chemical Reaction Engineering
For the same residence time, which one will give the maximum conversion?

Single tubular flow reactor (v = 5 litres)
Stirred tank followed by tubular flow reactor (each of 2.5 litres)
Two stirred tank (each of 2.5 litres) in series
Single stirred tank (v = 5 litres)

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Chemical Reaction Engineering
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)

E + ΔHA
E + ΔHA - ΔHR
E
ΔHA + ΔHR

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