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Decreasing pressure by increasing volume

Posted: Sat Jan 11, 2020 2:03 pm
by Tyler Angtuaco 1G
Dr. Lavelle established that increasing the pressure by decreasing volume results in the production of more products if there is more moles of gas on reactant side and more reactants if there are more moles of gas on product side. Will these trends be the same if we decrease pressure, such as if we were to expand the container of gas without adding more gas?

Re: Decreasing pressure by increasing volume  [ENDORSED]

Posted: Sat Jan 11, 2020 2:07 pm
by Brittney Hun 2C
I believe the trends are the same, just in the opposite direction. So the reaction will shift to the side that has less moles.

Re: Decreasing pressure by increasing volume

Posted: Sat Jan 11, 2020 2:16 pm
by Lara Kristine Bacasen 1L
I believe you're correct considering it's the inverse. Just look at the ideal gas law PV = nRT

Re: Decreasing pressure by increasing volume

Posted: Sat Jan 11, 2020 3:20 pm
by Rory Simpson 2F
Decreasing the pressure would cause the reaction to shift towards whichever side has more moles. Because of the pressure decrease and the volume increase, the concentrations would decrease resulting in the shift.

Re: Decreasing pressure by increasing volume

Posted: Sat Jan 11, 2020 3:48 pm
by 305385703
There will be the same effect on the equilibrium in the opposite direction. Decreasing the pressure (by increasing the volume) will push the equilibrium in the direction of the side with more moles of gas.