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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 containing two components, the Gibbs adsorption equation in terms of surface excess is: : where : is the surface tension, :i is the surface excess of component i, :i is the chemical potential of component i. ==Adsorption== Different influences at the interface may cause changes in the composition of the near-surface layer〔Shchukin, E.D., Pertsov, A.V., Amelina E.A. and Zelenev, A.S. Colloid and Surface Chemistry. 1st ed. Mobius D. and Miller R. Vol. 12. Amsterdam: Elsevier Science B.V. 2001.〕 Substances may either accumulate near the surface or, conversely, move into the bulk.〔 The movement of the molecules characterizes the phenomena of adsorption. Adsorption influences changes in surface tension and colloid stability. Adsorption layers at the surface of a liquid dispersion medium may affect the interactions of the dispersed particles in the media and consequently these layers may play crucial role in colloid stability〔Hiemenz, Paul C. and Rajagopalan, Raj. Principles of Colloid and Surface Chemistry. 3rd ed. New York: Marcel Dekker, Inc, 1997.〕 The adsorption of molecules of liquid phase at an interface occurs when this liquid phase is in contact with other immiscible phases that may be gas, liquid, or solid〔Chattoraj, D.K. and Birdi, K.S. Adsorption and the Gibbs Surface Excess. New York: Plenum Publishing Company, 1984.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gibbs isotherm」の詳細全文を読む スポンサード リンク
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