## Finding Gibbs free energy with K

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

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

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

LeAirraBullingor2k
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Joined: Wed Mar 13, 2019 12:15 am

### Finding Gibbs free energy with K

On the homework problem 5g.13, how do we calculate gibbs free energy if we arent given the value of RT?

Sanjana Munagala_1j
Posts: 103
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### Re: Finding Gibbs free energy with K

R is a constant that you can find on the equations sheet posted on Dr. Lavelle's website. The one you want to use here is 8.314 J.K^-1.mol^-1. T is the temperature which in this problem is given as 1200. K.

Hope that helps!

McKenna_4A
Posts: 115
Joined: Sat Aug 24, 2019 12:18 am

### Re: Finding Gibbs free energy with K

Simply look up the value of R for the units being used

Nathan Nakaguchi 1G
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### Re: Finding Gibbs free energy with K

R is a constant, so refer to the constants and equations sheet on Lavelle's website and choose whichever has the correct units you need. T is provided in the question.