3rd order?


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Nadege Diedrich 1H
Posts: 11
Joined: Fri Sep 25, 2015 3:00 am

3rd order?

Postby Nadege Diedrich 1H » Tue Feb 16, 2016 8:13 pm

What is the units for third order rxns?

Betty Tesfaye 2G
Posts: 11
Joined: Fri Sep 25, 2015 3:00 am

Re: 3rd order?

Postby Betty Tesfaye 2G » Tue Feb 16, 2016 8:13 pm

1/M^2s

Michael Lee 2I
Posts: 51
Joined: Fri Sep 29, 2017 7:05 am

Re: 3rd order?

Postby Michael Lee 2I » Sat Mar 10, 2018 12:38 am

I agree

204918982
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: 3rd order?

Postby 204918982 » Sat Mar 10, 2018 2:46 pm

If you don't remember the units for k for certain orders you can always just divide the rate by the concentration. For 3rd order reactions, the units are (M/s)(1/M^3) which simplifies to (1/M^2)s

Cam Bear 2F
Posts: 60
Joined: Thu Jul 27, 2017 3:01 am

Re: 3rd order?

Postby Cam Bear 2F » Sat Mar 10, 2018 8:16 pm

What would we be asked about third order reactions other than their units?

Fatima_Iqbal_2E
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Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

Re: 3rd order?

Postby Fatima_Iqbal_2E » Sat Mar 10, 2018 11:15 pm

If you want to write the units of K in terms of molarity, it would be , but if you wanted to write it in terms of moles and liters, it would be .

Pooja Nair 1C
Posts: 55
Joined: Thu Jul 13, 2017 3:00 am

Re: 3rd order?

Postby Pooja Nair 1C » Fri Mar 16, 2018 2:46 am

If you look at first order and second order reactions, when you increase the order, you raise the power of the L and the mol in the units. Thus as you increase the order further, the power continues to rise.

Rachel Wang
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

Re: 3rd order?

Postby Rachel Wang » Fri Mar 16, 2018 7:07 pm

It's very rare for 3rd order rxns to occur unless it's the overall rxn's order. The units are 1/M^2.s


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