An experimental study of the equation of state of liquid xenon

Abstract

The gas-expansion method has been used to measure the density of liquid xenon at 17 temperatures from 165.00 to 289.74K and at pressures up to 3815 atm. The 530 experimental points have been fitted to the Strobridge equation, which has been used to estimate, at regular intervals of pressure and temperature, the following properties: density; isothermal compressibility; thermal expansivity; thermal pressure coefficient; configurational internal energy; and entropy relative to the saturated liquid. Within the range of the experiments, the configurational internal energy is very nearly a linear function of density. The experimental results, together with estimated third virial coefficients and published values of vapour pressure, second virial coefficient, and sound velocity in the liquid phase, have been used to estimate the following properties of the saturated liquid on the liquid-vapour coexistence curve: enthalpy of vaporization; configurational internal energy; isothermal compressibility; thermal expansivity; thermal pressure coefficient; adiabatic compressibility; and heat capacity. The results have been use, together with published pressure, temperature data for the melting curve, to estimate the following properties of the saturated liquid on the liquid-solid coexistence curve: density; isothermal compressibility; thermal expansivity and thermal pressure coefficient.