You can get the concept of: The vapor pressure, enthalpy of evaporation, Equation Clausius-Clapeyron, Rule Trouton-Pictet.
Principle: For each temperature above the liquid is set a certain pressure. If external pressure is reduced by gaseous phase, equilibrium is restored by the evaporation of the liquid phase. Enthalpy of vaporization of acetone is determined by measuring the vapor pressure at different temperatures.
