## Differences in Gibbs Free Energy

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Alyssa Wilson 2A
Posts: 65
Joined: Fri Sep 28, 2018 12:18 am

### Differences in Gibbs Free Energy

What happens when K<1, and Gibbs free energy is a positive value, assuming P and R are in their standard states?

David S
Posts: 54
Joined: Fri Sep 28, 2018 12:15 am

### Re: Differences in Gibbs Free Energy

K < 1 implies that at a given temp, the reactants are more favored than products, and thus the forward reaction to form more products is unfavorable.

This is confirmed by a Positive Delta G, which tells us that the forward reaction is not spontaneous (endergonic), and needs energy/work input to be driven forward

904936893
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

### Re: Differences in Gibbs Free Energy

I think Dr. Lavelle also mentioned that when K<1, enthalpy dominates over entropy, and the reaction will be non-spontaneous

Rami_Z_AbuQubo_2K
Posts: 89
Joined: Thu Jun 07, 2018 3:00 am

### Re: Differences in Gibbs Free Energy

In a general sense, why are we looking at the K value when solving problems with Gibbs free energy?