## A in the Arrhenius equation

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

Cowasjee_Sanaea_3E
Posts: 27
Joined: Fri Jul 22, 2016 3:00 am

### A in the Arrhenius equation

I'm still confused as to what A is in the Arrhenius equation?
We never used it in our homework or quiz. Is there a time we will use it?

Is it constant for all equations?

Monica Habashy 3A
Posts: 68
Joined: Wed Sep 21, 2016 2:59 pm
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### Re: A in the Arrhenius equation

A is the pre exponential factor. Usually it's the same in throughout a type of reaction. You could be asked to find it if you are given all the other values.

Vandan_Patel_3L
Posts: 14
Joined: Wed Sep 21, 2016 2:55 pm

### Re: A in the Arrhenius equation

A is also usually used when a catalyst or enzyme is discussed as that is the factor that gets affected when the enzyme positions a molecule in a certain way so that the reaction will occur.

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