pressure change

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josmit_1D
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

pressure change

Postby josmit_1D » Sun Jan 12, 2020 11:35 am

what is the general rule for change in pressure under Le Chatelier's principle?

Jessica Booth 2F
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

Re: pressure change

Postby Jessica Booth 2F » Sun Jan 12, 2020 11:39 am

The general rule for change in pressure is that if the pressure has increased the side of the reaction with fewer moles is favored. This, however, only applies if the pressure is changed by changing the volume because then the concentrations change.

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: pressure change

Postby jisulee1C » Sun Jan 12, 2020 11:41 am

Le Chatelier's principle states that the chemical reaction will adjust to minimize the effects of changes such as the change of reactant added, change of product added, or change of pressure. Specifically for pressure, if the pressure of the reaction increases or the volume decreases then the reaction will shift to the side with less moles of gas while if the pressure of the system is decreased or volume is increased, the reaction will shift toward the side with more moles of gas.

Emma Popescu 1L
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am

Re: pressure change

Postby Emma Popescu 1L » Fri Jan 17, 2020 12:19 pm

If the volume decreases and more moles of gas are on the left, the reaction shifts to the right. If the volume decreases and there are more moles of gas on the right, then the reaction shifts to the left. The reaction responds to minimize the effect of increasing pressure (by decreasing volume).

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

Re: pressure change

Postby Kylie Lim 4G » Fri Jan 17, 2020 12:53 pm

If pressure is increased due to a decrease in volume, the reaction will favor the side with fewer moles. If pressure is increased due to the addition of an inert gas there is no change in equilibrium.


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