## Measuring ∆G°

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

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

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

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

### Measuring ∆G°

In class on Friday, it was mentioned that ∆G°is not measured directly. What does it mean that ∆G°is not measured directly?

Ami_Pant_4G
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am

### Re: Measuring ∆G°

I think it means that it is very difficult to measure ∆G° in the lab, so the best way to determine it's value is through calculations with the gibbs energy equation. Hope this helps

Tahlia Mullins
Posts: 105
Joined: Thu Jul 25, 2019 12:15 am

### Re: Measuring ∆G°

Yes, I agree! I remember it being mentioned in lecture that it would be meaningless to try to actually measure free energy alone, so the equation must be used in order to find the value of the standard change in Gibbs free energy.