Half-life of first order reactions


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Nancy Le - 1F
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Joined: Fri Sep 29, 2017 7:07 am

Half-life of first order reactions

Postby Nancy Le - 1F » Mon Mar 05, 2018 12:29 am

Is it correct to say that the greater the rate constant, the shorter the half-life is because it doesn't depend on the concentration of reactants?

Julian Krzysiak 2K
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

Re: Half-life of first order reactions

Postby Julian Krzysiak 2K » Mon Mar 05, 2018 12:38 am

Yup, that is exactly correct!

From the book, "The half-life of a reactant that decays in a first-order reaction is characteristic of the reaction and independent of the initial concentration. It is inversely proportional to the rate constant of the reaction."

Allison Young 1K
Posts: 23
Joined: Fri Sep 29, 2017 7:06 am

Re: Half-life of first order reactions

Postby Allison Young 1K » Mon Mar 05, 2018 1:18 am

Yes, the half-life decreases as the rate constant increases.

Ya Gao
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Joined: Fri Sep 29, 2017 7:04 am
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Re: Half-life of first order reactions

Postby Ya Gao » Mon Mar 05, 2018 1:46 am

Yes and it not only works for first order reactions. It is the case for all reactions.


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