Chemical Reaction Engineering
Rate of a chemical reaction is not affected by the

Reactant's concentration
Catalyst
Temperature
Number of molecules of reactants taking part in the reaction

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

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
Both forward and backward reactions will be exothermic
Neither of the reactions will be en-dothermic

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