Thermodynamics of liquid mixtures of xenon and methyl fluoride

(Vapour+liquid) equilibria of {xCH3Cl+(1−x)HCl} at temperatures (159.01 and 182.33) K

“…Using the method described in our previous work [1] one arrives at the results shown in 3 Cl + (1 À x)HCl}, and of the calculated mole fractions z A , z B , and z AB at equilibrium obtained from the chemical theory of solutions K is the equilibrium constant …”

“…The vapour pressure of the liquid mixtures were measured as a function of composition using the apparatus and techniques described in previous work [3]. The pressure was measured using a quartz-spiral gauge (Texas Instruments, model 154-01) which had been calibrated against primary standards.…”

“…The triple-point pressures p t so obtained are compared with values taken from the literature in table 1. The ancillary values needed in the evaluation of G E m from the experimental measurements were taken either from the literature or from our own work: (i) the values of the second virial coefficients B necessary to account for gas imperfection were taken from the compilation by Dymond and Smith [6] for CH 3 Cl, and from [7] for HCl; (ii) for the liquid molar volumes of CH 3 Cl and HCl we have used values from [4,7], respectively. All the temperatures have been converted into ITS-90 by recommended techniques [8].…”

Liquid mixtures involving cyclic molecules: (vapour + liquid) equilibria of (xenon + ethylene oxide)

“…The reduced dipole moment of dimethylether is m* = 0.62 and that of ethylene oxide is m* = 1.00 and the G E m (x = 0.5) value of (xenon + ethylene oxide) is twice that of (xenon + dimethylether) (table 2) respectively, at the same reduced temperature. (11,12) Therefore, it seems doubtful that the polarity of ethylene oxide is solely responsible for the larger values of G E m .…”

Excluded volume contribution to deviations from ideality in liquid mixtures: Consequences for engineering models

“…The VLE data, giving the compositions of the vapor and liquid phases and the pressure, were found for S1 at 115.77 K [29], S2 at 161.38 K [30], S3 at 182.33 K [31] and S4 at 303.15 K [32]. These references also gave the molar volumes of the mixtures vs. composition at these temperatures, except for S3 for which the molar volumes of the pure solvents are given elsewhere [33,34]. When available, the excess molar volume of liquid was fitted by an expression of the type V E = a 1 x 1 x 2 [1 + a 2 x 1 + a 3 x 1 2 ] in which the a i parameters were adjusted by least squares.…”