sign of k

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Abigail Urbina 1K
Posts: 102
Joined: Thu Jul 27, 2017 3:01 am

sign of k

Postby Abigail Urbina 1K » Fri Mar 16, 2018 9:56 pm

Can the rate constant, k, ever be negative?

Cristina Sarmiento 1E
Posts: 52
Joined: Wed Nov 16, 2016 3:02 am

Re: sign of k

Postby Cristina Sarmiento 1E » Fri Mar 16, 2018 10:01 pm

No, rate constants can never be negative.

Isita Tripathi 2E
Posts: 52
Joined: Sat Jul 22, 2017 3:00 am
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Re: sign of k

Postby Isita Tripathi 2E » Fri Mar 16, 2018 10:16 pm

It's all about the wording. For example, the rate of decomposition is positive (even though its concentration is decreasing) because it is the rate at which it is disappearing. This is why we have to take the negative of the d[A]/dt for the rate in A --> B.

Katelyn B 2E
Posts: 29
Joined: Fri Sep 29, 2017 7:05 am

Re: sign of k

Postby Katelyn B 2E » Sun Mar 18, 2018 12:16 am

Rate constants can never be negative because the rate of a reaction is always positive.

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