Chemical Reaction Engineering
When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as

ND = n + 1
None of these
ND = (n + 1)/2
ND = n/2

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Chemical Reaction Engineering
For all positive reaction orders for a particular duty,

Reactor size is independent of the type of flow
Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order
Density variation during reaction affects design
Mixed reactor is always larger than the plug-flow reactor

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Chemical Reaction Engineering
For a heterogeneous catalytic reaction

The catalyst does not form an intermediate complex with the reactant
A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important
The surface of the catalyst does not play an important role during reaction
Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction

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Chemical Reaction Engineering
The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

Collision frequency increases
Value of threshold energy decreases
Fraction of molecules having threshold energy increases
Increased temperature reduces the activation energy

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