Half Lives


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Paula Dowdell 1F
Posts: 72
Joined: Tue Nov 15, 2016 3:00 am

Half Lives

Postby Paula Dowdell 1F » Sat Mar 03, 2018 2:48 pm

Why is it that half lives of 0-order reactions and 2nd-order reactions are "not used"? (pg. 631 in the book)

Alvin Tran 2E
Posts: 39
Joined: Fri Sep 29, 2017 7:06 am

Re: Half Lives

Postby Alvin Tran 2E » Sat Mar 03, 2018 3:35 pm

I think it is because the half-lives of zero order and second order reactions depend on the concentration, so it is constantly changing as the concentration changes. In contrast, first order reaction half lives don't depend on concentration and as such are always constant, which makes it easier to use.

Kevin Tabibian 1A
Posts: 42
Joined: Fri Sep 29, 2017 7:06 am

Re: Half Lives

Postby Kevin Tabibian 1A » Sat Mar 03, 2018 5:28 pm

Because decay is typically a first order reaction


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