Gibbs adsorption isotherm

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Gibbs adsorption isotherm

[′gibz ad′sȯrp·shən ′ī·sō‚thərm]
(physical chemistry)
An equation for the surface pressure of surface monolayers, where φ is surface pressure, T is absolute temperature, R is the gas constant, Γ is the number of molecules adsorbed per gram per unit surface area, and p is the pressure of the gas.