Arrhenius Equation Variables

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

Drew Myers 4G
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Arrhenius Equation Variables

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

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

Re: Arrhenius Equation Variables

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.

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Re: Arrhenius Equation Variables

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

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Arrhenius Equation Variables

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.

Nick Lewis 4F
Posts: 111
Joined: Wed Sep 18, 2019 12:18 am

Re: Arrhenius Equation Variables

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?