Thermodynamic potential

Thermodynamic potential (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \Phi} ). In the Landau theory of second-order phase transitions the thermodynamic potential takes the form of a power series in the order parameter (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \eta} ) (Ref. 1 Eq. 143.1)

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \left.\Phi(P, T, \eta)\right. = \Phi_0 + \alpha(P,T)\eta + A(P,T)\eta^2 + C(P,T)\eta^3 + B(P,T)\eta^4 + ...,}

where P is the pressure and T is the temperature.

See also

• Internal energy (U)
• Helmholtz energy function (A)
• Gibbs energy function (G)
• Enthalpy (H)

References

1. L. D. Landau and E. M. Lifshitz, "Statistical Physics" (Course of Theoretical Physics, Volume 5) 3rd Edition Part 1, Pergamon Press (1980)