Chemical Reaction Engineering
A catalyst in a chemical reaction __________ free energy change in the reaction.

Decreases
Increases
Neither A nor B
Either A or B; depends on the type of catalyst

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Chemical Reaction Engineering
A space time of 3 hours for a flow reactor means that

Three reactor volumes of feed can be processed every hour
The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours
Conversion is cent per cent after three hours
It takes three hours to dump the entire volume of the reactor with feed

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Chemical Reaction Engineering
In an ideal P.F.R. at steady state conditions

The conversion of the reactant varies from point to point along a flow path
The composition of reactants remains constant along a flow path
There may be diffusion along the flow path
There is no lateral mixing of fluid

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