## Non-integer orders

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

Shuyi Yu 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Non-integer orders

Will we ever be expected to know/find non-integer (like 1.5) reactant orders?

Brian Chhoy 4I
Posts: 66
Joined: Fri Sep 28, 2018 12:16 am

### Re: Non-integer orders

Lavelle says that it is not likely that we would get a non-integer order, since that is not common in natural reactions. You might get one that is a few decimal points off ( 1.97), thus you would just assume this is from experimental errors and round to 2.

lukezhang2C
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

### Re: Non-integer orders

The only non-integer order which is mentioned in the book which occurs commonly would be the 1/2 order, but the rest should be ranging from 0-3 at most.

Sydney Tay 2B
Posts: 64
Joined: Fri Sep 28, 2018 12:20 am

### Re: Non-integer orders

Lavelle said that most orders will be in whole number calculations.

Leila_4G
Posts: 114
Joined: Sat Sep 14, 2019 12:17 am

### Re: Non-integer orders

Is there a certain amount within an integer that we should get in order to assume it counts for experimental error and round it?
Like, say on the exam I get n=1.75. Is that close enough to round to 2? If not, what is the general cutoff for being close enough?

Ryan Yoon 1L
Posts: 55
Joined: Mon Jul 01, 2019 12:15 am

### Re: Non-integer orders

There will be no noninteger orders as Lavelle said most calculations are centered in whole number calculations and they arent common in nature.

Anish Natarajan 4G
Posts: 51
Joined: Thu Jul 25, 2019 12:16 am

### Re: Non-integer orders

Most likely not considering what we've covered in class

Frank He 4G
Posts: 50
Joined: Tue Nov 12, 2019 12:19 am

### Re: Non-integer orders

Leila_4G wrote:Is there a certain amount within an integer that we should get in order to assume it counts for experimental error and round it?
Like, say on the exam I get n=1.75. Is that close enough to round to 2? If not, what is the general cutoff for being close enough?

As others have suggested, we're probably only going to encounter whole numbers or very near whole numbers in our class, so if we get 1.75 then that might be reason to assume there was a mistake somewhere, so if time permits, it'd be wise to check over our work again.