## 15.63 Units with ln?

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

Tyra Nguyen 4H
Posts: 74
Joined: Fri Sep 28, 2018 12:25 am

### 15.63 Units with ln?

15.63 The rate constant of the reaction between CO2 and
OH- in aqueous solution to give the HCO3- ion is 1.5 x
1010 L.mol-1s-1 at 25 oC. Determine the rate constant at blood temperature (37 oC), given that the activation energy for the reaction is 38 kJ.mol-1.

I got the right answer, but I thought that the units of k2 would also be L.mol-1.s-1. Why is it mol.L-1.s-1?

In general, I am unsure of what to do with units when using the ln function.

almaochoa2D
Posts: 67
Joined: Fri Sep 28, 2018 12:23 am

### Re: 15.63 Units with ln?

Make sure to write units when calculating. That makes it a lot easier to tell which units it's supposed to be. Also if you're given the order you can know what units k is suppose to be in.