Stefan's formula

For the formula describing ice formation, see Stefan's equation.

In thermodynamics, Stefan’s formula says that the specific surface energy at a given interface is determined by the respective enthalpy difference $\scriptstyle \Delta H^{*}$.

$\sigma =\gamma _{0}\left({\frac {\Delta H^{*}}{N_{A}^{1/3}V_{m}^{2/3}}}\right),$

where σ is the specific surface energy, N_A is Avogadro's number, $\gamma _{0}$ is a steric dimensionless coefficient, and V_m is the molar volume.

References

• Guencheva, V., Grantscharova, E. & Gutzow, I., Thermodynamic Properties of the Amorphous and Crystalline Modifications of Carbon and the Metastable Synthesis of Diamond, Cryst. Res. Technol., 2001, 36, 1411–1428