## Units

$K = \frac{k_{forward}}{k_{reverse}}$

Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

### Units

Will units for k values given a trial chart always be M^-2.s^-1? Or will this unit change based on the reaction order?

Ariana Iranmahboub1G
Posts: 114
Joined: Fri Aug 09, 2019 12:17 am

### Re: Units

It would depend on the reaction order. For instance, if it is zero order the unit is mol*L^-1*s^-1. For the first order, it is s^-1. And for the second order, it is L*mol^-1*s^-1

JamieVu_2C
Posts: 108
Joined: Thu Jul 25, 2019 12:16 am

### Re: Units

The units for k will depend on the overall order of the reaction. k has the units of L^2 * mol^-2 * s^-1 when the overall order is 3.

Julie Park 1G
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: Units

You can use example 7A.7 from the book to see exactly the units for k change based on the reaction order! A easy way to find out the units is to use $M^{n-1}\cdot t^{-1}$ where M = mol/L and n is the reaction order