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

Mixed reactor is always larger than the plug-flow reactor
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

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Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

A fixed conversion of a given batch of feed takes 5 hours
After every 5 hours, reactor is being filled with the feed
Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour
Cent per cent conversion can be achieved in at least 5 hours

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Chemical Reaction Engineering
The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Reaction is elementary with a molecularity of 2
Reaction is elementary but the molecularity may not be 2
Reaction may be elementary with molecularity of 2
Molecularity of the reaction is 2, but the reaction may not be elementary

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