Will the value of the factor, A, in the Arrhenius equation increase or decrease as the size and complexity of the reacting molecules increase?

1 Answer
SCooke
Apr 2, 2018

In general, it will decrease, as it is a factor considering the probability of a correct orientation for reaction. Larger molecules will have a lower probability of correct alignment for reaction than smaller ones.

Explanation:

A is known as the frequency factor, having units of L mol-1 s-1, and takes into account the frequency of reactions and likelihood of correct molecular orientation.
https://opentextbc.ca/introductorychemistry/chapter/activation-energy-and-the-arrhenius-equation-2/

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