Gibbs isotherm
（重定向自Gibbs Adsorption Isotherm）
![Figure 1: Comparison between the real and idealized models of the surface](/Images/godic/202501/15/Gibbs_image_25332.png")
![Figure 2: Variation in the concentration of components in the surface phase of the real model](/Images/godic/202501/15/Gibbs_image_35332.png")
![](/Images/godic/202501/15/Gibbs_image_45332.png")
![electrical microtome Microm HM 200.](/Images/godic/202501/15/Electrical_microtome5332.jpg")
The Gibbs adsorption isotherm for multicomponent systems is an equation used to relate the changes in concentration of a component in contact with a surface with changes in the surface tension, which results in a corresponding change in surface energy. For a binary system, the Gibbs adsorption equation in terms of surface excess is: