Arrhenius Equation

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

BenJohnson1H
Posts: 68
Joined: Fri Sep 28, 2018 12:17 am

Arrhenius Equation

How does one calculate the frequency factor, A, in the Arrhenius equation?

Sophie Roberts 1E
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: Arrhenius Equation

I dont recall prof Lavelle explaining in class but I remember him saying in this class we will generally be using A=1.

Courtney Quan 1C
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Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 2 times

Re: Arrhenius Equation

A as the pre-exponential factor/measure of the rate at which molecules collide is one of the Arrhenius parameters (the other being activation energy), which means it can only be found through experiments. I'd assume that we would be given the value of A if needed to solve a problem involving the Arrhenius equation.

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Arrhenius Equation

Hey Ben!
In lecture he said if it's not given to you to just assume that the value is 1

BenJohnson1H
Posts: 68
Joined: Fri Sep 28, 2018 12:17 am

Re: Arrhenius Equation

Yay! Thanks Esther:)))<3