Units


Moderators: Chem_Mod, Chem_Admin

smurphy1D
Posts: 51
Joined: Mon Nov 18, 2019 12:18 am

Units

Postby smurphy1D » Thu Mar 12, 2020 9:21 am

Are units for all rate constants M/s? And what does it mean if the s has a -1 attached in the denominator?

asannajust_1J
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am
Been upvoted: 1 time

Re: Units

Postby asannajust_1J » Thu Mar 12, 2020 9:33 am

the units for k are 1/M^(n-1)*s. n being the order of the reaction. Thus, if the reaction is first order the units are 1/s and second order 1/Ms and so on.
x-1 is just 1/x

Michael Nguyen 1E
Posts: 120
Joined: Sat Aug 17, 2019 12:17 am

Re: Units

Postby Michael Nguyen 1E » Thu Mar 12, 2020 9:34 am

The unit for the rate constant will depend on the overall reaction order. The rate will always be in units of M/s and each concentration will be in M. So the rate constant will always be in units so that when multiplied with the concentrations, the result will be in M/s.

Leonardo Le Merle 1D
Posts: 56
Joined: Wed Feb 27, 2019 12:16 am

Re: Units

Postby Leonardo Le Merle 1D » Thu Mar 12, 2020 11:12 am

Zeroth order: M * s^-1
First order: s^-1
Second Order: M^-1 * s^-1
etc.

Tanmay Singhal 1H
Posts: 143
Joined: Sat Jul 20, 2019 12:16 am

Re: Units

Postby Tanmay Singhal 1H » Thu Mar 12, 2020 11:16 am

rate constant units are determined by order of reaction


Return to “General Rate Laws”

Who is online

Users browsing this forum: No registered users and 0 guests