3/2 overall order

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Rida Ismail 2E
Posts: 139
Joined: Sat Sep 07, 2019 12:16 am

3/2 overall order

Postby Rida Ismail 2E » Wed Mar 11, 2020 2:53 pm

How would you get an overall order of 3/2? This is displayed possible in one of the thinking points in focus 7A.3 in the textbook. Also in that case what are the units of an overall order of 3/2?

Alex Tchekanov Dis 2k
Posts: 118
Joined: Sat Aug 24, 2019 12:16 am

Re: 3/2 overall order

Postby Alex Tchekanov Dis 2k » Wed Mar 11, 2020 2:55 pm

It is possible to have fractional orders however, this is out of the scope of this class and you wouldn't be required to know this.

805303639
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Joined: Thu Jul 11, 2019 12:16 am
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Re: 3/2 overall order

Postby 805303639 » Thu Mar 12, 2020 8:00 am

A reaction with an overall order of 3/2 requires that its slow, rate-determining elementary step has fractional stoichiometric coefficients. The rate law for a 3/2 order reaction would have a rate constant with units (L/mol)^1/2 * s^-1.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: 3/2 overall order

Postby Ying Yan 1F » Fri Mar 13, 2020 11:06 am

As the previous students, mentioned, it is not necessary to know fractional orders for this course. However, if you are curious, fractionals orders usually occur when products are also taken into consideration when writing the rate law. :)


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