Effect of increasing pressure on reactions

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JesseAuLec1Dis1G
Posts: 52
Joined: Mon Jun 17, 2019 7:23 am

Effect of increasing pressure on reactions

Postby JesseAuLec1Dis1G » Sun Jan 19, 2020 10:10 pm

Can someone explain to me what happens if you increase pressure on a reaction? Increasing pressure decreases volume so wouldn't products be favored? From my notes I have that increasing pressure doesn't favor products or reactants.

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

Re: Effect of increasing pressure on reactions

Postby Deepika Reddy 1A » Sun Jan 19, 2020 10:13 pm

If the pressure is increased, then the reaction favors the side of the reaction that has fewer moles of gas. In class, he gave us C=n/V and said that the change in concentration caused by the change in volume is what affects the reaction.

Ashley Wang 4G
Posts: 103
Joined: Wed Sep 11, 2019 12:16 am

Re: Effect of increasing pressure on reactions

Postby Ashley Wang 4G » Sun Jan 19, 2020 10:32 pm

I think the situation your notes are referring to is when you pump an inert gas into a vessel of fixed volume. Because the concentrations of the reactants and products don't change in this case, neither the forward nor the reverse reaction are favored.
In the case where you change the pressure via a change in volume (compression or expansion), the system will response in the way described by the previous comment.

Anushka Chauhan2B
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

Re: Effect of increasing pressure on reactions

Postby Anushka Chauhan2B » Sun Jan 19, 2020 10:35 pm

If the pressure is increased, equilibrium is disrupted. As a result, the reaction would shift to the side with the fewest number of moles.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: Effect of increasing pressure on reactions

Postby SimranSangha4I » Sun Jan 19, 2020 10:40 pm

The reaction would end up shifting towards the side in which there are fewer mole because that would effect the equilibrium!

005162520
Posts: 101
Joined: Tue Sep 24, 2019 12:17 am

Re: Effect of increasing pressure on reactions

Postby 005162520 » Sun Jan 19, 2020 10:45 pm

Why isn't when you add inert gas, the concentrations and the equilibrium do not change ?

205154661_Dis2J
Posts: 109
Joined: Wed Sep 18, 2019 12:21 am

Re: Effect of increasing pressure on reactions

Postby 205154661_Dis2J » Sun Jan 19, 2020 11:27 pm

The reaction would shift towards the side with fewer moles!


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