## G at different stages of a run

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

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

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

Payton Kammerer 2B
Posts: 49
Joined: Tue May 01, 2018 3:00 am

### G at different stages of a run

"The value of DG at a particular stage of the reaction is the difference in the molar Gibbs free energies of the products and the reactants at the partial pressures or concentrations that they have at that stage, weighted by the stoichiometric coefficients interpreted as amounts in moles"

Is there a way to change this from delta G to absolute G? Like, to use the Q of the reaction to calculate the total Gibbs free energy available at that point in the reaction's progression?

JonathanS 1H
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

### Re: G at different stages of a run

Yes, we can use Q to determine delta G at any point in a reaction, but it will still be delta G rather than just G because Gibbs free energy refers to amount of energy available to do work, and if there is no change, no work is being done.

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