Change in Pressure caused by Volume

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Janice Park 1E
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Change in Pressure caused by Volume

Postby Janice Park 1E » Thu Jan 24, 2019 9:12 pm

If there is a change in pressure caused by the volume to be halved, then the reaction will shift to the side of the equation with the smaller sum of coefficients. However, what exactly happens during that shift? For example, if it shifts towards the products, does that mean the concentration of products increases?

Chem_Mod
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Re: Change in Pressure caused by Volume

Postby Chem_Mod » Thu Jan 24, 2019 9:41 pm

Yes. The concentration of products will increase. If you calculate the Q, you would see Q < K at that moment.

Matthew Mar 1J
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Re: Change in Pressure caused by Volume

Postby Matthew Mar 1J » Sat Jan 26, 2019 1:31 pm

However, the equilibrium constant K doesn't change. The pressure shift only causes a change in the amount of products or reactants, not the ratio.

Amar Singh
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Re: Change in Pressure caused by Volume

Postby Amar Singh » Sun Jan 27, 2019 3:03 pm

Yes, remember that Le Chatelier's principle wants equations to balance out any changes that might occur in the environment. This means that when pressure is increased, the side with the less amount of moles will be favored to try and balance it out. For example, if the products have the smaller amount of moles, more reactants will be turned into the product and therefore the concentration of the products will increase and the concentration of the reactants will decrease.


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