# Gibb’s Free Energy

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can someone explain Gibb’s Free Energy and how it is applied and it's relation and changes to entropy... thanks!

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What's the equation for Gibbs Free Energy?

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Wingardium Leviosa

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The Gibbs function is a Legendre Transformed of the internal energy function, G=U-TS+PV where the the extensive variables, entropy and volume, are replaced by their corresponding intensive variables, temprerature and pressure, respectively.

Its differential: dG=-S dT + V dP + mu dN

Hope this helps.

Nicolas.

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Gibbs free energy combines both entropy and enthalpy values in the equation....

$G =H-TS$

If the value comes out greater than 0, the reaction is thought to be feasible.

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what about deltaS and deltaH, dont those factor in somewhere?

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Check out this Link it has the equation in several forms and some brief explanations.

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what about deltaS and deltaH, dont those factor in somewhere?

it should be.....

$\Delta G = \Delta H - T \Delta S$ at standard conditions.

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