Standard Gibbs Free Energies, ?Gof
- Every substance in a specific state has a
Gibbs Free Energy, G = H - TS
- recall: only ?H can be measured. Therefore:
there is no absolute scale for G
- only ?G values can be determined
- DGof the Gibbs Free Energy of formation (from elements) is used as the “standard value”
- We set the scale of G to be consistent with that for H -
DGof for elements in standard states = 0