Chemical Reaction Engineering
The heat of reaction

Depends on the mechanism of reaction only
Depends on the pressure only
Is independent of the mechanism of reaction
Depends on both pressure and mechanism of reaction

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Chemical Reaction Engineering
In case of staged packed bed reactors carrying out exothermic reaction, use

Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature
High recycle for pure gas
All of these
Plug flow for dilute liquid requiring no large preheating of feed

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