Increase in Volume Effect on Equilibrium

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Jeannine 1I
Posts: 73
Joined: Fri Sep 28, 2018 12:27 am

Increase in Volume Effect on Equilibrium

Postby Jeannine 1I » Wed Jan 23, 2019 9:17 pm

I understand that when you decrease volume, the side with more moles becomes more crowded and "bumps into each other" more often, which is why the reaction then favors the side with fewer moles. But can someone help me visualize why when you increase volume, the side with more moles is favored? Why would the reaction shift to a side that has more moles?

Sarah Kiamanesh 1D
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

Re: Increase in Volume Effect on Equilibrium

Postby Sarah Kiamanesh 1D » Wed Jan 23, 2019 9:37 pm

Volume and pressure are inversely related. When volume increases, pressure decreases, which is also an altered state of the system that needs to be corrected by Le Chatelier's principle. The system increases pressure back to its original amount by favoring the side of the reaction with more moles, so there are more molecule-molecule interactions.

Angela Grant 1D
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Increase in Volume Effect on Equilibrium

Postby Angela Grant 1D » Wed Jan 23, 2019 9:56 pm

The reaction responds in such a way that minimizes the effect of a pressure change, so increasing volume (decreasing pressure) in a system with more moles on one side will favor that same side.

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: Increase in Volume Effect on Equilibrium

Postby Alana Sur 3B » Thu Jan 24, 2019 1:31 am

Is this applicable to moles of gas only?

Karina Jiayu Xu 4E
Posts: 58
Joined: Fri Sep 28, 2018 12:29 am

Re: Increase in Volume Effect on Equilibrium

Postby Karina Jiayu Xu 4E » Fri Jan 25, 2019 9:56 pm

thanks!

Ashley Kim
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am
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Re: Increase in Volume Effect on Equilibrium

Postby Ashley Kim » Sat Jan 26, 2019 9:34 am

This is for moles of gas only!

uhedlund
Posts: 38
Joined: Wed Nov 15, 2017 3:03 am

Re: Increase in Volume Effect on Equilibrium

Postby uhedlund » Sun Jan 27, 2019 8:26 pm

When volume is increased, pressure is decreased. So when volume is decreased on one side of the reaction, the other side of the reaction will be favored due to its lower pressure.


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