Gibbs Free Energy/Equil Constant Relationship






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Sydney Wu 2M
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Gibbs Free Energy/Equil Constant Relationship

Postby Sydney Wu 2M » Sun Jan 29, 2017 2:20 pm

On page 41 of the course reader, it says delta G* is positive when K<1 and that delta G* is negative when K>1. Does that mean the forward reaction is not spontaneous when K<1 and is when K>1? I understand the arithmetic but I don't understand because if K<1, the reaction will want to go forward (spontaneous forward), and if K>1, then the reaction will want to go in reverse (not spontaneous forward).

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Re: Gibbs Free Energy/Equil Constant Relationship

Postby Chem_Mod » Tue Jan 31, 2017 11:58 am

"On page 41 of the course reader, it says delta G* is positive when K<1 and that delta G* is negative when K>1. Does that mean the forward reaction is not spontaneous when K<1 and is when K>1?"

Correct

"I understand the arithmetic but I don't understand because if K<1, the reaction will want to go forward (spontaneous forward), and if K>1, then the reaction will want to go in reverse (not spontaneous forward)."

These are equilibrium constants, the reaction is not going in any direction. At equilibrium the [R] and [P] don't change.


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