## Gibbs free energy

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

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

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

Christina Chang 1C
Posts: 34
Joined: Thu May 10, 2018 3:00 am

### Gibbs free energy

I know that it won’t be on the midterm, but what else does calculating Gibbs free energy tell us besides whether or not the reaction is spontaneous?

sophiebillings1E
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

### Re: Gibbs free energy

It tells you if the reaction is favorable which is based on spontaneity

Annalyn Diaz 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: Gibbs free energy

It also tells us the free energy of a system at any point in time. The fact that it a state function makes it easier to calculate as you would with dH° and dS°.

Simran Rai 4E
Posts: 58
Joined: Fri Sep 28, 2018 12:17 am

### Re: Gibbs free energy

If the value is negative, then it's spontaneous and favors product formation and if the value is positive, then it's non spontaneous and does not favor formation of products.

ran2000
Posts: 66
Joined: Fri Sep 28, 2018 12:15 am

### Re: Gibbs free energy

It tells us about spontaneity of a reaction, work and can be used to calculate the equilibrium constant.

Lauren Huang 1H
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Re: Gibbs free energy

Also, Dr. Lavelle said in lecture that Gibbs free energy only refers to situations where the system is not at equilibrium, since delta G when the system is at equilibrium is zero.