## third order

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

Priscilla Okaiteye
Posts: 61
Joined: Tue Nov 21, 2017 3:02 am

### third order

Do we need to worry about third order anything?

Gillian Ward 1F
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

### Re: third order

Possibly, it is in the curriculum.

Arman M 1A
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Joined: Wed Nov 14, 2018 12:23 am
Been upvoted: 1 time

### Re: third order

I believe Professor Lavelle said we were going to cover only up to second order

Rogelio Bazan 1D
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Joined: Tue Nov 14, 2017 3:01 am

### Re: third order

Hope this helps, from my understanding Dr. Lavelle only wants us to focus on 1st, 2nd, and Oth order reactions but third order is not a scope of this class.

MichelleRamirez_2F
Posts: 63
Joined: Fri Sep 28, 2018 12:28 am

### Re: third order

The textbook says their are mostly uncommon. It may be useful to know because they may appear when asked for overall reaction order.

Andie Jian 1D
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### Re: third order

Because third order reactions are so uncommon, I think Lavelle mentioned that we would not be focusing on them at all for calculations. Especially because the equation is not on the formula sheet, I think it would be really unlikely we would have to calculate anything for them. If anything, I would just understand that if it is third order, that means 3 molecules/atoms would have to collide at the same time and place in order for the reaction to occur.

Subhani Diu 1F
Posts: 16
Joined: Fri Sep 28, 2018 12:20 am

### Re: third order

In lecture he mentioned that they are unlikely and he placed more emphasis on understanding the 0th, 1st, and 2nd order.