## Standard Gibbs Free Energy

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

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

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

Hellen Truong 2J
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

### Standard Gibbs Free Energy

Can it be considered standard Gibbs free energy if it is given for a temperature other than 25C?

Sarah_Stay_1D
Posts: 57
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

### Re: Standard Gibbs Free Energy

Hellen Truong 2J wrote:Can it be considered standard Gibbs free energy if it is given for a temperature other than 25C?

The measured standard Gibbs free energy values in our textbook are all for 25 degrees Celsius. If you calculate the Gibbs free energy for a system not at standard temperature, then you do not have the *standard* Gibbs free energy anymore, just ΔG .

Johann Park 2B
Posts: 51
Joined: Thu Jul 27, 2017 3:01 am
Been upvoted: 1 time

### Re: Standard Gibbs Free Energy

Standard Gibbs Free Energy entails 1 bar of pressure and a specified temperature (in this case being 25oC (298 K)). Otherwise, it should be noted as just a "Gibbs Free Energy" value.

Amanda Wu 2C
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am

### Re: Standard Gibbs Free Energy

Standard Gibbs Free Energy (delta G naught) is given under standard conditions where temperature is 25 degrees Celsius. Given for other temperatures, it would just be Gibbs Free Energy (delta G).