how can you tell

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annikaying
Posts: 94
Joined: Sat Sep 14, 2019 12:16 am

how can you tell

Postby annikaying » Sun Mar 01, 2020 2:11 pm

How can you tell whether kinetics or thermodynamics controls a reaction?

KeyaV1C
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Re: how can you tell

Postby KeyaV1C » Sun Mar 01, 2020 2:11 pm

In general, short reaction times favor kinetic control while longer reaction times favor thermodynamic control

805307623
Posts: 99
Joined: Fri Aug 09, 2019 12:17 am

Re: how can you tell

Postby 805307623 » Sun Mar 01, 2020 3:32 pm

Short reaction times usually suggest kinetic control, and longer reaction times usually suggest thermodynamic reaction control. If a reaction is under thermodynamic control at a certain temp, it will also be under thermodynamic control at a higher temp for the same reaction time. If a reaction is under kinetic control at a certain temp, it will also be under kinetic control at any lower temp for the same reaction time.

Connor Chappell 2B
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Joined: Wed Feb 20, 2019 12:16 am

Re: how can you tell

Postby Connor Chappell 2B » Sun Mar 01, 2020 3:42 pm

Reactions that are carried out quickly (i.e. those with short reaction times) are said to be kinetically controlled while those carried out over longer periods of time are said to be thermodynamically controlled.

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

Re: how can you tell

Postby Louise Lin 2B » Sun Mar 01, 2020 4:11 pm

reactions that quickly react usually mean that it is controlled more via kinetics, while reactions that are carried out more slowly suggest that they are being controlled more via thermodynamics. this is also the reason why the terms spontaneous and nonspontaneous might be misleading,

805373590
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Joined: Wed Sep 11, 2019 12:17 am

Re: how can you tell

Postby 805373590 » Sun Mar 01, 2020 4:39 pm

https://m.youtube.com/watch?v=DrToRsXmjP4
The youtube video explains the difference useful to know when distinguish between thermodynamic and kinetic control.

Esha Chawla 2E
Posts: 108
Joined: Thu Jul 25, 2019 12:17 am

Re: how can you tell

Postby Esha Chawla 2E » Sun Mar 01, 2020 4:40 pm

annikaying wrote:How can you tell whether kinetics or thermodynamics controls a reaction?


For the reactions that are spontaneous but slow, I believe that kinetics control the reaction more. For reactions that are spontaneous but fast, I believe that thermodynamics control the reaction more. For reactions that are not spontaneous, they are defined more by thermodynamics.

Callum Guo 1H
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Re: how can you tell

Postby Callum Guo 1H » Sun Mar 01, 2020 4:41 pm

reactions that are short are kinetically controlled while longer ones are thermo controlled

Leyna Dang 2H
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Joined: Thu Jul 25, 2019 12:17 am

Re: how can you tell

Postby Leyna Dang 2H » Sun Mar 01, 2020 4:46 pm

kinetically controlled reactions are usually short while thermo controlled reactions are long.

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

Re: how can you tell

Postby Jasmine W 1K » Sun Mar 01, 2020 5:02 pm

Reactions with short reaction times are usually controlled by kinetics, while reactions with longer reaction times are usually controlled by thermodynamics.

Andres Merlos 2L
Posts: 46
Joined: Wed Sep 18, 2019 12:17 am

Re: how can you tell

Postby Andres Merlos 2L » Sun Mar 01, 2020 5:32 pm

Thermodynamic-controlled reactions are usually long, while kinetic-controlled reactions are relatively quick.

rohun2H
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: how can you tell

Postby rohun2H » Sun Mar 01, 2020 5:35 pm

Those controlled by kinetics are usually short and ones controlled by thermodynamics are usually longer.


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