The Units of k (rate constant) for second order

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Hector_Galarza_2E
Posts: 11
Joined: Wed Sep 21, 2016 2:58 pm

The Units of k (rate constant) for second order

Postby Hector_Galarza_2E » Mon Feb 20, 2017 3:19 pm

As I was trying to figure out the units for the rate constant (k) for second order, using the integrated rate law, I got that the units were 1/M^-1*sec^-1, are these units correct? If so, could an explanation be provided as to how they can be understood conceptually.

JaeHoCho1B
Posts: 16
Joined: Sat Jul 09, 2016 3:00 am

Re: The Units of k (rate constant) for second order

Postby JaeHoCho1B » Mon Feb 20, 2017 3:25 pm

It is going to be that since the initial rate is measured in M/S while the [A]^2 is in M^2. So as a result, k has to be 1/(M)(s).

Amy_Bugwadia_3I
Posts: 37
Joined: Wed Sep 21, 2016 2:56 pm
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Re: The Units of k (rate constant) for second order

Postby Amy_Bugwadia_3I » Mon Feb 20, 2017 3:30 pm

The units for second order reactions is M^(-1)* s^(-1), or L/(mol*s), so you are correct!


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