Preferred Label : Lippman's equation;
IUPAC definition : An equation which gives the electric charge per unit area of an interface (electrode):
\[(\frac{ γ }{ E_{{A}}})_{T,p,μ _{i}\neq μ } - Q_{{A}}\] where γ is the interfacial
tension, EA is the potential of a cell in which the reference electrode has an interfacial
equilibrium with one of the ionic components of A, Q A is the charge on unit area
of the interface, µ i is the chemical potential of the combination of species i whose
net charge is zero, T is the thermodynamic temperature and p is the external pressure.
Since more than one type of reference electrode may be chosen, more than one quantity
Q may be obtained. Consequently Q cannot be considered as equivalent to the physical
charge on a particular region of the interphase. It is in fact an alternative way
of expressing a surface excess or combination of surface excess of charged species.;
Origin ID : L03577;
See also
An equation which gives the electric charge per unit area of an interface (electrode):
\[(\frac{ γ }{ E_{{A}}})_{T,p,μ _{i}\neq μ } - Q_{{A}}\] where γ is the interfacial
tension, EA is the potential of a cell in which the reference electrode has an interfacial
equilibrium with one of the ionic components of A, Q A is the charge on unit area
of the interface, µ i is the chemical potential of the combination of species i whose
net charge is zero, T is the thermodynamic temperature and p is the external pressure.
Since more than one type of reference electrode may be chosen, more than one quantity
Q may be obtained. Consequently Q cannot be considered as equivalent to the physical
charge on a particular region of the interphase. It is in fact an alternative way
of expressing a surface excess or combination of surface excess of charged species.
