System propertiesNote: Conjugate variables in

*italics*Material properties Compressibility: β = − {\displaystyle \beta =-} Thermal expansion: α = {\displaystyle \alpha =} Equations

- Maxwell relations
- Onsager reciprocal relations
- Bridgman's equations
*Table of thermodynamic equations*

- Internal energy

U ( S , V ) {\displaystyle U(S,V)} - Enthalpy

H ( S , p ) = U + p V {\displaystyle H(S,p)=U+pV} - Helmholtz free energy

A ( T , V ) = U − T S {\displaystyle A(T,V)=U-TS} - Gibbs free energy

G ( T , p ) = H − T S {\displaystyle G(T,p)=H-TS}

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