Changing Pressure

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Eileen Si 1G
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Joined: Fri Aug 30, 2019 12:17 am

Changing Pressure

Postby Eileen Si 1G » Mon Jan 13, 2020 4:25 pm

How does increasing or decreasing the partial pressure of a reactant affect the partial pressure of the product, and vice versa for a change in product and its effect on the reactant?

Brian_Ho_2B
Posts: 221
Joined: Fri Aug 09, 2019 12:16 am

Re: Changing Pressure

Postby Brian_Ho_2B » Mon Jan 13, 2020 4:30 pm

Eileen Si 3G wrote:How does increasing or decreasing the partial pressure of a reactant affect the partial pressure of the product, and vice versa for a change in product and its effect on the reactant?


Think of equilibrium as an unbalanced see-saw where one side is supposed to have a different "weight" than the other, but it reaches a point of equilibrium where the ratio of R/P is ideal. Here's a short way to show what happens when partial pressures of reactants/products change.
Reactants increase -> Products favored
Reactants decrease -> reactants favored
Products decrease -> products favored
Products increase -> reactants favored

Connor Chappell 2B
Posts: 59
Joined: Wed Feb 20, 2019 12:16 am

Re: Changing Pressure

Postby Connor Chappell 2B » Mon Jan 13, 2020 4:35 pm

And it also may be worth noting that when dealing with changes in concentration of certain gases (pressures etc.), only increasing pressure by decreasing volume will have an effect on the concentration of the compound. If pressure is increased by adding an inert gas, as Professor Lavelle made note of, the concentration of the compound in Mol L^-1 does not change (n/v does not change).

cassidysong 1K
Posts: 100
Joined: Fri Aug 30, 2019 12:15 am

Re: Changing Pressure

Postby cassidysong 1K » Tue Jan 14, 2020 10:03 pm

reactants and products have an inversely proportional relationship, so if R goes down, P goes up, if P goes down, R goes up.


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