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Topic: Does adding solid to a reaction at equilibrium shift equilibrium?  (Read 5392 times)

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Offline TheAbsoluTurk

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Does adding solid to a reaction at equilibrium shift equilibrium?
« on: January 01, 2012, 02:45:15 AM »
The problem in question:

4Cu0s + energy  ::equil:: 2Cu2Os + O2

The equilibrium will shift to the right as a result of:

            a. adding CuOs

            b. removing O2

            c. adding a catalyst

            d. decreasing temperature

I know it is either a. or b.

Thanks for any help you can provide.
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Offline UG

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Re: Does adding solid to a reaction at equilibrium shift equilibrium?
« Reply #1 on: January 01, 2012, 03:02:08 AM »
Adding more of the solid doesn't affect the equilibrium
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Offline TheAbsoluTurk

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Re: Does adding solid to a reaction at equilibrium shift equilibrium?
« Reply #2 on: January 01, 2012, 03:11:03 AM »
Thank you.
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Offline Borek

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Re: Does adding solid to a reaction at equilibrium shift equilibrium?
« Reply #3 on: January 01, 2012, 06:18:58 AM »
Also note: it is not CuOs, it is CuO(s).
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Offline vladi307

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Re: Does adding solid to a reaction at equilibrium shift equilibrium?
« Reply #4 on: January 01, 2012, 02:31:48 PM »
The concentration of a solid substance practically didn't change during the reaction. It is equal to the ratio d/Mr, d = density of the solid (g/ml) and Mr = molecular weight (g/mol). For this reason, adding of CuO(s) didn't affect the equilibrium of the mentioned reaction.
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