Chemical Reaction Engineering
In the reversible reaction of the type, A + B ⇋ AB, in general

Neither of the reactions will be en-dothermic
Both forward and backward reactions will be exothermic
The combination reaction will be exothermic, while the dissociation reaction will be endothermic
The combination reaction will be endothermic, while the dissociation reaction will be exothermic

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

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

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