## third order

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

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

### third order

Do we need to worry about third order anything?

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

### Re: third order

Possibly, it is in the curriculum.

Arman M 1A
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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
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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.

Ruth Glauber 1C
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Joined: Wed Sep 18, 2019 12:20 am

### Re: third order

Does this apply to W20?

805097738
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Joined: Wed Sep 18, 2019 12:20 am

### Re: third order

Gillian Ward 1F wrote:Possibly, it is in the curriculum.

what is the third order?

Louise Lin 2B
Posts: 97
Joined: Sat Aug 17, 2019 12:15 am

### Re: third order

The third order is when three molecules collide at the same time and in a certain correct orientation that causes a reaction to take place.

Robert Tran 1B
Posts: 118
Joined: Thu Jul 11, 2019 12:15 am

### Re: third order

No, since third order reactions are very uncommon, they are not covered in our curriculum.

Jasmine W 1K
Posts: 49
Joined: Sat Sep 07, 2019 12:18 am

### Re: third order

No, we are not covering third order reactions.