## Arrhenius equation

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

Shanzey
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Joined: Wed Sep 18, 2019 12:20 am

### Arrhenius equation

What does the A value in the Arrhenius equation mean? Also when do we use this equation?

Naneeta Desar 1K
Posts: 106
Joined: Fri Aug 09, 2019 12:15 am

### Re: Arrhenius equation

A is the frequency of collisions with the correct orientation.

aishwarya_atmakuri
Posts: 101
Joined: Sat Jul 20, 2019 12:15 am

### Re: Arrhenius equation

A is a variable that represents the proportion of interactions that have the minimum activation energy and are in the right orientation.

Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Arrhenius equation

You use the Arrhenius equation when you need to determine the effect of a temp change on the rate constant, which changes the overall reaction rate.

Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Arrhenius equation

The rate constant is proportional to the reaction rate so if rate constant doubles so does the reaction rate.

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Arrhenius equation

A is considered the frequency factor or "pre-exponential" factor and includes the number of collisions with correct orientation. The Arrhenious equation is typically used with problems involving activation energy