Clausius-Clapeyron relation
From SklogWiki
The Clausius-Clapeyron relation is named after Rudolf Julius Emanuel Clausius and Benoît Paul Émile Clapeyron. Upon a phase equilibrium curve
\[\frac{dp}{dT} = \frac{\Delta \left( \frac{S}{N}\right)}{\Delta \left( \frac{V}{N}\right)} = \frac{\Delta S}{\Delta V}\]
where p is the pressure, T is the temperature, S is the entropy and V is the volume.