Page "Chemical potential" Paragraph 40

Every instance of phase or chemical equilibrium is characterized by a constant.

For instance, the melting of ice is characterized by a temperature, known as the melting point at which solid and liquid phases are in equilibrium with each other.

Chemical potentials can be used to explain the slopes of lines on a phase diagram by using the Clapeyron equation, which in turn can be derived from the Gibbs-Duhem equation.

They are used to explain such as melting point depression by the application of pressure.

Both Raoult's law and Henry's law can be derived in a simple manner using chemical potentils.