change in pressure

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Jane Burgan 1C
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

change in pressure

Postby Jane Burgan 1C » Mon Jan 14, 2019 7:51 pm

I understand why if there are more moles of gas on the left side of a reaction, then the reactions shifts right if pressure is added. But, why does the reaction shift left if pressure is added and there are moles of gas on the right?

Courtney McHargue 1I
Posts: 56
Joined: Fri Sep 28, 2018 12:17 am

Re: change in pressure

Postby Courtney McHargue 1I » Mon Jan 14, 2019 8:18 pm

Because of the same idea, if there are more moles on the right and pressure is added then the reaction will try to balance itself out by favoring the reverse reaction and going back to reactants.

Ronald Thompson 1F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: change in pressure

Postby Ronald Thompson 1F » Mon Jan 14, 2019 9:14 pm

The Process works in both directions depending on the moles of gas on either side.

Jesse Kuehn 1B
Posts: 40
Joined: Wed Nov 14, 2018 12:23 am

Re: change in pressure

Postby Jesse Kuehn 1B » Mon Jan 14, 2019 9:23 pm

I find it easier to picture the products as reactants and just flip the equation around so that it reads the opposite way. It is easier for me to see which way the reaction would shift when i do this

Ahmed Mahmood 4D
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

Re: change in pressure

Postby Ahmed Mahmood 4D » Mon Jan 14, 2019 9:32 pm

The reaction's direction shifts to balance out any changes made on the system. Accordingly, if there are more moles of products, the reaction will shift to favor the reactants when pressure is added in order to retain a balanced system.


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