Change in pressure

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Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Change in pressure

What is the rule for increasing or decreasing pressure and its affect on shifting the reaction?

805329408
Posts: 49
Joined: Wed Nov 20, 2019 12:21 am

Re: Change in pressure

Increasing the pressure will shift the reaction to the side with less moles of gas.

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

Re: Change in pressure

I like to think of it as a balancing act. If you decrease the volume on one side which increases the pressure, the reaction will favor the side with less molecules because the pressure needs to go somewhere else, if that makes sense.

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

Re: Change in pressure

If you increase the pressure of the reaction, the reaction will shift to the side with fewer moles of gas. If you decrease the pressure of the reaction, the reaction will shift to the side with the greater number of moles of gas. A change in pressure causes a shift in the reaction because it alters the concentrations of the substances in the reaction, which causes it to no longer be at K.

Chris Charton 1B
Posts: 69
Joined: Mon Jun 17, 2019 7:23 am

Re: Change in pressure

Because the system want to remain at equilibrium, increasing pressure will cause the equation to shift towards the side with fewer moles of gas.

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: Change in pressure

Increasing the pressure will shift the reaction to the side with fewer moles of gas and decreasing the pressure will shift the reaction to the side with more moles of gas. If there is an equal number of moles on the reactants and products, then there will be no change.

Jesalynne 2F
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Change in pressure

If the pressure is increased the reaction would want to go back to equilibrium, so the reaction will shift to the side with fewer gas particles. If the pressure were to decrease then the reaction would go towards the side with more gas particles.

AGaeta_2C
Posts: 112
Joined: Wed Sep 18, 2019 12:21 am

Re: Change in pressure

Lavelle explained this in lecture once that increasing the pressure will shift the reaction to the side with less moles of gas (this is the simplified way of thinking about it)