## Gibbs free energy

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

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

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

Shanzey
Posts: 120
Joined: Wed Sep 18, 2019 12:20 am

### Gibbs free energy

What is the difference between (delta)G and (delta)G^o in the equation (delta)G = (delta)G^o + RTlnQ?

Jonathan Gong 2H
Posts: 105
Joined: Sat Jul 20, 2019 12:16 am

### Re: Gibbs free energy

delta G is just the overall Gibbs free energy. delta G naught is the Gibbs free energy of the reaction at standard conditions.

Jessica Castellanos
Posts: 102
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Been upvoted: 1 time

### Re: Gibbs free energy

Delta G naught is Gibb's Free Energy with substances in standard state, while delta G isn't. In general, when naught is used, it indicates substance in standard state.

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

### Re: Gibbs free energy

Just like with entropy, the knot on the delta G means that it is the standard for that reaction at standard conditions.

Jacob Villar 2C
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Joined: Sat Aug 17, 2019 12:18 am

### Re: Gibbs free energy

Delta G naught is delta G but under standard conditions.

Lauren Stack 1C
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

### Re: Gibbs free energy

The degree symbol is to show that the value was found under standard conditions, while the deltaG without the degree symbol will be total change in Gibbs Free Energy, and not restricted to solely standard conditions.