The chemical potential of a substance B in a mixture of substances B, C ... is related to the Gibbs energy \(G\) of the mixture by: \[\mu _{\text{B}}=(\frac{\partial G}{\partial n_{\text{B}}})_{T,p,n_{\text{C}\neq \text{B}}}\] where \(T\) is the @T06321@, \(p\) is the pressure and \(n_{\text{B}}\), \(n_{\text{C}}\), ... are the amounts of substance of B, C, ... . For a pure substance B, the chemical potential \(\mu _{\text{B}}^{*}\) is given by: \[\mu _{\text{B}}^{*}=\frac{G^{*}}{n_{\text{B}}}=G_{\text{m}}^{*}\] where \(G_{\text{m}}^{*}\) is the molar Gibbs energy, and where the superscript * attached to a symbol denotes the property of the pure substance. The superscript \(^{\unicode{x29B5}}\) or \(^{\unicode{x26ac}}\) attached to a symbol may be used to denote a @S05927@.
See also:
standard chemical potential
Green Book, 2nd ed., p. 49 [Terms] [Book]
PAC, 1994, 66, 533. (Standard quantities in chemical thermodynamics. Fugacities, activities and equilibrium constants for pure and mixed phases (IUPAC Recommendations 1994)) on page 535 [Terms] [Paper]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 966 [Terms] [Paper]