rate constant k


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Olivia L 4E
Posts: 59
Joined: Fri Sep 28, 2018 12:23 am
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rate constant k

Postby Olivia L 4E » Sat Mar 09, 2019 9:46 pm

Why is the rate constant k not negative for second order reactions?

Kyle Golden Dis 2G
Posts: 67
Joined: Fri Sep 28, 2018 12:17 am

Re: rate constant k

Postby Kyle Golden Dis 2G » Sat Mar 09, 2019 9:51 pm

Rate constants are never negative in any reactions. The value of k will always be positive.

Simran Rai 4E
Posts: 58
Joined: Fri Sep 28, 2018 12:17 am

Re: rate constant k

Postby Simran Rai 4E » Sat Mar 09, 2019 10:16 pm

You can think about it as a rate not proceeding negatively. It can be slow, or you can have a reverse rate, but a “negative” rate is not possible.

maldonadojs
Posts: 57
Joined: Fri Sep 28, 2018 12:27 am

Re: rate constant k

Postby maldonadojs » Sat Mar 09, 2019 11:38 pm

With regards to the integrated rate law, this is due to the fact that when you are integrating the derivative, because of the integrated version being 1/[A] there happens to be a -1, but they divided the negative from the k over to cancel these out.


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