## Calculations for Gibbs free energy

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

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

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

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Brevin Hensley 1C
Posts: 24
Joined: Fri Sep 28, 2018 12:25 am

### Calculations for Gibbs free energy

I understand how to solve the equation $Delta G=\Delta H-T\Delta S$. But for other methods when given the number of moles can someone explain how to solve these/what is the reasoning behind it? Thank you.

Ana Pedreros
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

### Re: Calculations for Gibbs free energy

When given the number of moles and asked to find delta G, you can use the moles when finding entropy by subtracting the number of moles of reactants from the products.

Madeline Motamedi 4I
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Calculations for Gibbs free energy

Remember that although you are using delta G= delta H-T times delta S, you can still replace components of the equation with other equations you learned previously. So, you could find an equation for delta H that includes moles and any other given information. Then you could substitute this value with your delta H and proceed.

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