## A

Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$

905373636
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### A

For the Arrhenius Equation, why is A approximately = 1 in most cases in this class?

Jorja De Jesus 2C
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### Re: A

Are you referring to the frequency factor? I think it is A=Zp but it is not usually calculated so it is just left as 1.

gconcha
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### Re: A

$k=Ae^{-E_{a}/RT}$
The "A" component is a probability out of a total 1.00, and represents the chance that the molecules are in the correct orientation when they collide.

I think we're making the experimental assumption that A doesn't adversely affect reactions modeled with the Arrhenius equation.