Frequency factor (chemistry)

In chemical kinetics, the frequency factor or A factor or pre-exponential factor is a constant in the Arrhenius equation indicating how many collisions between reactants have the correct orientation to lead to products.

Related Topics:
Chemical kinetics - Arrhenius equation - Reactants - Products

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In the Arrhenius equation

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:k=Ae^{rac{-E_A}{RT}}

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• k is the rate constant for the reaction
• A is the frequency factor
• E is the activation energy
• R is the gas constant
• T is the temperature