(p, V-m, T) measurements on liquid and gaseous mixtures near the critical point. II. (xenon + ethene)

A high-pressure expansion apparatus, described previously, has been used to measure the densities of {xXe + (1 - x)C2H4} at x = (0.0278, 0.489, and 0. 759). The results reported in this paper cover the homogeneous gas and the Liquid regions in the temperature range from 273 K up to near the critical point of the mixture and at pressures up to 6.5 MPa. The molar volume of th e gas, at the dew point pressure, and of the liquid, at the bubble point pr essure, were obtained by extrapolation. Using the gas phase results, the se cond and third virial coefficients of the mixtures were calculated at T = 2 73 K. (C) 2000 Academic Press.