Stefan's formula

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.^{[1][better source needed]}