## Half-Life of Zero Order

$\frac{d[R]}{dt}=-k; [R]=-kt + [R]_{0}; t_{\frac{1}{2}}=\frac{[R]_{0}}{2k}$

Sophia Bozone 2G
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

### Half-Life of Zero Order

Next to the half life equation for zero order reactions i the text book it says that the equation isn't used. Do you know why this is? It also has that written next to the Second order half life equation but we were asked about that on Test #3. Should i assume that this is fair game as well?

Ozhen Atoyan 1F
Posts: 50
Joined: Thu Jul 27, 2017 3:01 am
Been upvoted: 1 time

### Re: Half-Life of Zero Order

Yes you should assume it is fair game. It says not used, because those order reactions most likely do not occur often in the real world. However, we will still need to know how to use the formulas when asked about those specific orders.

Max Mazo 2C
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

### Re: Half-Life of Zero Order

Since Dr. Lavelle covered the derivation in class, you should assume it's fair game for the final just in case. It's on the equation sheet so you should be fine as long as you know what it is.

Jimmy Zhang Dis 1K
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

### Re: Half-Life of Zero Order

It would probably be good to know for the test. Even though the book mentioned it won't be used Lavelle might decide to put it in a problem