Pressure and Volume

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Haley Dveirin 1E
Posts: 101
Joined: Sat Jul 20, 2019 12:17 am

Pressure and Volume

Postby Haley Dveirin 1E » Fri Jan 10, 2020 1:44 pm

do changes in pressure and volume affect K? if not, why not? if it does, how does it affect it?

Sarah Zhari 1D
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Pressure and Volume

Postby Sarah Zhari 1D » Fri Jan 10, 2020 2:01 pm

Changing the pressure of a container by decreasing or increasing its volume does not affect K. This is because the partial pressures of all the gases involved in calculating K change by a common factor when a gas is compressed or otherwise, therefore the overall ratio of products to reactants remains the same.

Jessica Esparza 2H
Posts: 130
Joined: Wed Sep 18, 2019 12:15 am

Re: Pressure and Volume

Postby Jessica Esparza 2H » Fri Jan 10, 2020 2:02 pm

It does not affect K. I believe it can affect the concentration of products and reactants but not the ratio between them.

aishwarya_atmakuri
Posts: 101
Joined: Sat Jul 20, 2019 12:15 am

Re: Pressure and Volume

Postby aishwarya_atmakuri » Fri Jan 10, 2020 2:52 pm

The value of K would depend on whether pressure would change from a change in volume (would change) or addition of an inert gas (no change) based on how concentration would change.

Katie Kyan 2K
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Joined: Fri Aug 09, 2019 12:16 am
Been upvoted: 1 time

Re: Pressure and Volume

Postby Katie Kyan 2K » Fri Jan 10, 2020 3:58 pm

Changes in pressure do not affect K as Dr. Lavelle mentioned in class. Adding an inert gas to increase pressure does not affect the moles of the reactant or product and the volume remains constant. Similarly, changes in volume also do not affect K as the system will try to restore equilibrium through Le Chatelier's Principle.

Hannah Pham
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Pressure and Volume

Postby Hannah Pham » Fri Jan 10, 2020 4:04 pm

Changes in pressure and volume do not affect value of the equilibrium constant.

Kylie Lim 4G
Posts: 110
Joined: Sat Aug 17, 2019 12:15 am

Re: Pressure and Volume

Postby Kylie Lim 4G » Fri Jan 10, 2020 4:28 pm

Equilibrium constant for a single reaction is affected by temperature changes, not pressure

Ellen Amico 2L
Posts: 101
Joined: Thu Sep 19, 2019 12:16 am

Re: Pressure and Volume

Postby Ellen Amico 2L » Fri Jan 10, 2020 4:51 pm

Changes in pressure or volume cause changes in concentration (due to PV=nRT), and changes in concentration don't affect K due to Le Chatelier's Principle, so that's why pressure and volume don't affect K, only temperature.

Anna Heckler 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

Re: Pressure and Volume

Postby Anna Heckler 2C » Fri Jan 10, 2020 4:59 pm

Changing the pressure does not affect K, as K is a constant and all of the pressures would change by the same factor. Temperature DOES change K.


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