THERMODYNAMIC PROPERTIES OF XENON IN THE CRITICAL REGION

Abstract

Using the detailed compressibility data in the critical region of xenon given in the preceding paper, supplemented by measurements of Beattie, Barriault, and Brierley over a wider range of temperatures and densities, thermodynamic properties have been calculated for the critical region—extending from the critical temperature to 50° above it and from low densities to somewhat above the critical density. The values of Cυ at the critical density are in good agreement with those calculated from acoustical data at temperatures higher than Tc + 1°; closer to the critical temperature however, the Cυ values derived from the equation of state data become much greater than those derived from the acoustic data. This difference can be accounted for by dispersion effects in the high frequency acoustic data near the critical point.