## Gases

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

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

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

Mahir_Hasan2C
Posts: 60
Joined: Fri Sep 28, 2018 12:25 am

### Gases

Do gases have a - delta G value because they are typically spontaneous?

Te Jung Yang 4K
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

### Re: Gases

It depends what you are referring to when you say "gases." Delta G values are used to show the difference of the Free Energy before and after a reaction has occurred. Gases can take part in reactions that have a positive or negative Delta G.

jonathanjchang2E
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

### Re: Gases

If you look at the list of thermodynamic data in appendix 2a you'll find that most compounds have a negative delta G (formation), not only gases.

josephperez_2C
Posts: 70
Joined: Wed Nov 15, 2017 3:04 am

### Re: Gases

I believe the negative delta g that we typically see when deaing with gases is due to the fact that the entire process is spontaneous.