Le Chatelier's Principle

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Clara Cho 2K
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Joined: Wed Sep 18, 2019 12:18 am

Le Chatelier's Principle

Postby Clara Cho 2K » Wed Jan 15, 2020 12:41 pm

Does change in pressure affect the concentration of the reactants and products?

KeyaV1C
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am
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Re: Le Chatelier's Principle

Postby KeyaV1C » Wed Jan 15, 2020 1:10 pm

Yes it does. Increasing the pressure of a reaction by decreasing volume favors the side of the reaction with less mols of gas. If you increase pressure by adding an inert gas, it doesn’t change the concentration of reactants or products.

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

Re: Le Chatelier's Principle

Postby aishwarya_atmakuri » Wed Jan 15, 2020 1:23 pm

If the change in pressure changed the volume, it affects the concentration. If the change in pressure was caused by the addition of an intert gas, the volume hasn't changed so the concentrations have not changed.

Keya Jonnalagadda 1A
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Joined: Mon Jun 17, 2019 7:24 am

Re: Le Chatelier's Principle

Postby Keya Jonnalagadda 1A » Wed Jan 15, 2020 1:35 pm

As an addition to the earlier replies: Although changing the pressure changes the concentration of the products and reactants, their ratio will return to the equilibrium constant, Kp. Only a change in temperature changes Kp, not the pressure or concentration of products and reactants.

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

Re: Le Chatelier's Principle

Postby rohun2H » Wed Jan 15, 2020 2:54 pm

Yes, but K remains constant.

Miriam Villarreal 1J
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Re: Le Chatelier's Principle

Postby Miriam Villarreal 1J » Wed Jan 15, 2020 5:16 pm

When there is an increase in pressure, the equilibrium will shift towards the side of the reaction with fewer moles of gas. When there is a decrease in pressure, the equilibrium will shift towards the side of the reaction with more moles of gas.

Bilal Pandit 1J
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Joined: Wed Sep 11, 2019 12:16 am

Re: Le Chatelier's Principle

Postby Bilal Pandit 1J » Wed Jan 15, 2020 5:30 pm

When the pressure changes, then the Q will be different than the Kp, so you can figure out which way the experiment will shift according to that.


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