Dynamical measurement of saturation vapor pressures below and above room temperature
Abstract
We report on the implementation of a dynamical method for the determination-in an extended temperature range around room temperature-of the saturation vapor pressure and enthalpy of vaporization of low-volatility liquid substances. The method relies on isolating a precooled substance in a heated chamber under static vacuum conditions and monitoring the chamber pressure as the sample slowly thermalizes to the chamber temperature. We apply the method to four reference substances-diethyl phthalate, 1-decanol, 1-heptanol, and 1-hexanol-and provide accurate data for their saturation vapor pressure and enthalpy of vaporization in the range from -10 to 35 °C.
Fields of Study & Subjects
Chemical Thermodynamics and Molecular Structure
Phase Equilibria and Thermodynamics
Thermodynamic properties of mixtures
Publication details
- Journal / source
- Review of Scientific Instruments
- Publisher
- AIP Publishing
- Volume
- 97
- Issue
- 3
- Publication date
- 1 March 2026
- Language
- EN