theMaharajah Posted April 7, 2006 Share Posted April 7, 2006 can someone explain Gibb’s Free Energy and how it is applied and it's relation and changes to entropy... thanks! Link to comment Share on other sites More sharing options...
swansont Posted April 7, 2006 Share Posted April 7, 2006 What's the equation for Gibbs Free Energy? Link to comment Share on other sites More sharing options...
theMaharajah Posted April 7, 2006 Author Share Posted April 7, 2006 Wingardium Leviosa Link to comment Share on other sites More sharing options...
nicobudini Posted April 7, 2006 Share Posted April 7, 2006 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. Link to comment Share on other sites More sharing options...
aj47 Posted April 7, 2006 Share Posted April 7, 2006 Gibbs free energy combines both entropy and enthalpy values in the equation.... [math]G =H-TS[/math] If the value comes out greater than 0, the reaction is thought to be feasible. Link to comment Share on other sites More sharing options...
theMaharajah Posted April 8, 2006 Author Share Posted April 8, 2006 what about deltaS and deltaH, dont those factor in somewhere? Link to comment Share on other sites More sharing options...
hybrid04 Posted April 8, 2006 Share Posted April 8, 2006 Check out this Link it has the equation in several forms and some brief explanations. Link to comment Share on other sites More sharing options...
aj47 Posted April 10, 2006 Share Posted April 10, 2006 what about deltaS and deltaH, dont those factor in somewhere? Yea your right, my mistake it should be..... [math]\Delta G = \Delta H - T \Delta S[/math] at standard conditions. Link to comment Share on other sites More sharing options...
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