Preferred Label : Gibbs adsorption;
IUPAC definition : The surface excess amount or Gibbs adsorption of component i, n i σ, which may be
positive or negative, is defined as the excess of the amount of this component actually
present in the system over that present in a reference system of the same volume as
the real system and in which the bulk concentrations in the two phases remain uniform
up to the Gibbs dividing surface. That is \[n_{i} {σ } n_{i}- V {\alpha }\ c_{i} {\alpha
}- V {\beta }\ c_{i} {\beta }\] where n i is the total amount of the component i in
the system, ciα and ciβ are the concentrations in the two bulk phases α and β, and
V α and V β are the volumes of the two phases defined by the Gibbs surface.;
Origin ID : G02627;
See also
The surface excess amount or Gibbs adsorption of component i, n i σ, which may be
positive or negative, is defined as the excess of the amount of this component actually
present in the system over that present in a reference system of the same volume as
the real system and in which the bulk concentrations in the two phases remain uniform
up to the Gibbs dividing surface. That is \[n_{i} {σ } n_{i}- V {\alpha }\ c_{i} {\alpha
}- V {\beta }\ c_{i} {\beta }\] where n i is the total amount of the component i in
the system, ciα and ciβ are the concentrations in the two bulk phases α and β, and
V α and V β are the volumes of the two phases defined by the Gibbs surface.
