deltaG at equilibrium

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deltaG at equilibrium

Postby jillian1k » Sat Feb 03, 2018 10:39 am

I know Dr. Lavelle said most of the time we'll be working with systems at equilibrium, but how will we know when a system is not at equilibrium unless it's stated? Would being given the boiling point of the system be one indicator of equilibrium always (since it's where the liquid and gas phase coexist)?

Cynthia Tsang
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Re: deltaG at equilibrium

Postby Cynthia Tsang » Sat Feb 03, 2018 11:40 am

deltaG = 0 at equilibrium, so that might be an indicator, but I'm not sure if that would be given.

Christine Wastila 1H
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Re: deltaG at equilibrium

Postby Christine Wastila 1H » Sat Feb 03, 2018 12:07 pm

If given concentration or pressure, you could calculate Q and compare it to K if that value is given.

sahiltelang-Discussion 1J
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Re: deltaG at equilibrium

Postby sahiltelang-Discussion 1J » Sat Feb 03, 2018 12:24 pm

Another thing that we can look at to determine this is by looking at the deltaG of the products vs the reactants. When both of these two values equal each other then we know that the reaction is at equilibirum. If not then we can calculate the reaction quotient and see how the reaction will proceed

Michael Cheng 1C
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Re: deltaG at equilibrium

Postby Michael Cheng 1C » Sun Feb 04, 2018 1:30 am

How will you know using the Gibbs Free energy which way the reaction will proceed if its not at equilibrium?

Sarah Maraach 2K
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Re: deltaG at equilibrium

Postby Sarah Maraach 2K » Sun Feb 04, 2018 10:58 am

Calculating a negative deltaG means that the reaction is favorable in the forward direction. However, if you get a positive deltaG, this means the current direction is unfavorable, so it would proceed in the reverse direction.

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