### Arrhenius Equation Variables

Posted:

**Sun Mar 08, 2020 9:53 pm**Can someone explain what each of the variables in the Arrhenius equation represent?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=151&t=61653

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Posted: **Sun Mar 08, 2020 9:53 pm**

Can someone explain what each of the variables in the Arrhenius equation represent?

Posted: **Sun Mar 08, 2020 10:06 pm**

In the Arrhenius equation k=Ae^-Ea/RT, A is the "pre-exponential factor" or frequency factor, the frequency of collisions and their orientation, Ea is the activation energy, T is temperature, and R is the universal gas constant.

Posted: **Sun Mar 08, 2020 10:10 pm**

Does the Arrhenius equation simply tell us the effect of temperature on the rate constant?

Posted: **Sun Mar 08, 2020 10:11 pm**

PranaviKolla2B wrote:Does the Arrhenius equation simply tell us the effect of temperature on the rate constant?

Yes, the Arrhenius equation is used to measure/calculate what happens to the rate constant (and the rate of the reaction) when a change in temperature occurs.

Posted: **Mon Mar 09, 2020 2:27 pm**

Does this mean that the Arrhenius equation needs to be used when a catalyst is used and there is a temp change or just if there is a temperature change at all? Also, how does this come into play with a biological example? i.e what does it look like in nature?