Related Experiment Video
Updated: Jul 5, 2026

High-pressure Sapphire Cell for Phase Equilibria Measurements of CO2/Organic/Water Systems
Published on: January 24, 2014
Exp6-polar thermodynamics of dense supercritical water
Sorin Bastea1, Laurence E Fried
1Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA. sbastea@llnl.gov
Abstract:
We introduce a simple polar fluid model for the thermodynamics of dense supercritical water based on a Buckingham (exp-6) core and point dipole representation of the water molecule. The proposed exp6-polar thermodynamics, which is based on ideas originally applied to dipolar hard spheres, performs very well when tested against molecular dynamics simulations. Comparisons of the model predictions with experimental data available for supercritical water yield excellent agreement for the shock Hugoniot, isotherms, and sound speeds, and are also quite good for the self-diffusion constant and relative dielectric constant.
Related Concept Videos
Phase Diagram
Phase Diagram
Phase Diagrams
Thermodynamic Properties of Ideal Solutions
Freezing Point Depression and Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Freezing Point Depression and Boiling Point Elevation

