Combining the Tait equation with the phonon theory allows predicting the density of liquids up to the Gigapascal range.

ABSTRACT: Predicting the density of liquids at ultrahigh pressures in the case when only the data measured at ambient pressure are available is a long-standing challenge for thermodynamic research. In this work, we archived this goal for molecular liquids by applying the half-sum of the Tait equation and the Murnagnan equation in the form coordinated with Tait's at low pressure for predicting the density of molecular liquids up to the pressures more than 1 GPa with uncertainty comparable with the experimental one. It is shown that the control parameter, which is needed in addition to the initial density and the isothermal compressibility can be found using the speed of sound and the density at ambient pressure and has a clear physical interpretation in terms of the characteristic frequency of interm

SUBMITTER: Postnikov EB 

PROVIDER: S-EPMC9992665 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature