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In thermodynamics, Stefan's formula says that the specific surface energy at a given interface is determined by the respective enthalpy difference ${\displaystyle \Delta H^{*}}$. $${\displaystyle \sigma =\gamma _{0}\left({\frac {\Delta H^{*}}{N_{\text{A}}^{1/3}V_{\text{m}}^{2/3}}}\right),}$$ where σ is the specific surface energy, N_A is the Avogadro constant, ${\displaystyle \gamma _{0}}$ is a steric dimensionless coefficient, and V_m is the molar volume.

References

1. Guencheva, V.; Grantscharova, E.; Gutzow, I. (2001). "Thermodynamic Properties of the Amorphous and Crystalline Modifications of Carbon and the Metastable Synthesis of Diamond". Crystal Research and Technology. 36 (12): 1411–1428. Bibcode:2001CryRT..36.1411G. doi:10.1002/1521-4079(200112)36:12<1411::AID-CRAT1411>3.0.CO;2-8.

• Thermodynamic equations
• Chemical thermodynamics