Linked from
The 101 pages that link to Chemical potential, each with the reason it gives.
DesorptionRelated: It helps determine whether particles favor the surface or the surrounding phase.
Gas constantRelated: R determines the thermal scale in ideal-mixture chemical potentials.
Vacancy defectRelated: It helps determine vacancy concentrations in nonstoichiometric crystals.
Fundamental thermodynamic relationRelated: It weights particle-number change in the relation.
Phase ruleRelated: Equality of chemical potentials enforces equilibrium between phases.
Entropy of mixingRelated: Its composition dependence reflects the entropy gained as components mix.
Binary fluidRelated: Differences in chemical potential drive component diffusion through a mixture.