The Gibbs adsorption isotherm is an equation which could be considered an adsorption isotherm that connects surface tension of a solution with the concentration of the solute.
2.
The equation of the Gibbs Adsorption Isotherm can be derived from the particularization to the thermodynamics of the Euler theorem on homogeneous first-order forms . The Gibbs free energy of each phase, phase, and the surface phase can be represented by the equation: