## Using Appropriate Equation

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

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

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

Mia Navarro 1D
Posts: 52
Joined: Fri Sep 29, 2017 7:04 am

### Using Appropriate Equation

Can you only use the following equation when the temperature is 298K? If so, why? If not, when do you use it?
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Clara Rehmann 1K
Posts: 53
Joined: Fri Sep 29, 2017 7:03 am

### Re: Using Appropriate Equation

I think you are correct because Gibbs' free energy is temperature dependent, and thus the standard Gibbs' free energy should be at a certain temperature.

Gevork 2E
Posts: 32
Joined: Fri Sep 29, 2017 7:05 am
Been upvoted: 1 time

### Re: Using Appropriate Equation

Hi,

If the Delta G values were given at a specific temp then it would be okay as long as they are all at the same temperature. I believe that the same applies to the other conditions like pressure.