9.81 6th edition

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

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

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

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Joined: Fri Sep 28, 2018 12:22 am
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9.81 6th edition

This asks if Fe3O4 or Fe2O3 is more stable in air. In this question, I understand that you can set up an equation and determine which is more stable based on the sign of delta G, but why can you not instead look at the delta G of formation for each species and say that the more negative one would be more stable in air?

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: 9.81 6th edition

Can someone pls explain why an equation that interconverts the compounds determines the more stable compound?