## Arrhenius Equation A variable

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

EthanPham_1G
Posts: 104
Joined: Sat Jul 20, 2019 12:17 am

### Arrhenius Equation A variable

Will we be given what the value for A is for the Arrhenius equation? I don't know how else you could solve for k without knowing it.

Jessica Booth 2F
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

### Re: Arrhenius Equation A variable

You can solve for k using this version of the Arrhenius equation: $ln k = \frac{-E_{a}}{RT} + lnA$. To calculate k you need another k value for a different temperature and then you can subtract $lnk_{2}$ from $lnk_{1}$ and the lnA term will cancel.

Kassidy Ford 1I
Posts: 103
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

### Re: Arrhenius Equation A variable

Since A has to be solved for experimentally, we should be given it if it is needed in the equation. I think we will mostly be using the Arrhenius equation to solve for different values of k