## Gibbs Free Energy of Rxn

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

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

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

Joslyn_Santana_2B
Posts: 51
Joined: Wed Sep 21, 2016 2:58 pm

### Gibbs Free Energy of Rxn

W 2011 Q2

Why is 3H2 ignored in the 1st rxn? Why is H2 ignored in the 2nd rxn?
I thought it was because of a phase difference in the 1st one, but in the 2nd rxn there is no phase difference and it's still ignored.
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ntruong2H
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am
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### Re: Gibbs Free Energy of Rxn

Joslyn_Santana_2B wrote:W 2011 Q2

Why is 3H2 ignored in the 1st rxn? Why is H2 ignored in the 2nd rxn?
I thought it was because of a phase difference in the 1st one, but in the 2nd rxn there is no phase difference and it's still ignored.

Elements in their most stable form have a dG of 0