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

Abstract

VLE for (CH 3 Cl + HCl) has been experimentally determined at temperatures (159.01 and 182.33) K, using a static; method. The data were used to calculate the molar excess Gibbs energy at the two temperatures. The excess molar enthalpy estimated from the G E m values for the equimolar mixture is relatively large and negative: H E m ¼ Àð1011 AE 318Þ J AE mol À1 . The results have been compared with estimates from the chemical theory of solutions.

Speed of Sound Measurements and a Fundamental Equation of State for Hydrogen Chloride

“…The critical pressure p c = 8.3135 MPa was calculated from the present equation of state. Based on the triple point temperature T tp = 159.07 K published by Senra et al, 46 the according saturated liquid density ρ tp,liq = 34.4 mol•dm −3 was calculated by extrapolation of the saturated liquid line. For the conversion to specific units, the molar mass M = 36.4609 g•mol −1 of Wieser and Berglund 58 was adopted.…”

Nitrous oxide: Saturation properties and the phase diagram

“…(1), with the parameters given in the text. Legend: the symbols are: s, reference [5]; 4, reference [6]; 5, reference [7]; , reference [30]; , reference [8]; e, reference [31]; +, reference [37]; N, reference [10,11]; Ç, reference [12,13]; h, reference [14]; Â, reference [34]; , reference [15,16]; , reference [17][18][19][20]; , reference [21][22][23]; , reference [24][25][26][27]; , reference [38]; ., triple point, this work; d, critical point, this work. These results are of little use in extrapolating to the far temperature region in which we are interested for the present calculations, viz.…”

On Criteria for Occurrence of Azeotropes in Isothermal and Isobaric Binary Systems

“…The use of criterion (5) is applicable here, and columns 6 to 8 give the results -azeotropes in the fi rst two systems, but no azeotrope in the third, as consistently shown by each g E correlation. The next two entries (Zielkiewicz, 2003;Senra et al, 2002) refer to negative deviation and the use of criterion (7) in conjunction with the RK equation. The last entry in Table 2 is for the rare case of a double azeotrope, in the hexafl uorobenzene + benzene system at 60°C (Gaw and Swinton, 1968).…”

“…a)Eng and Sandler (1984); (b)Zielkiewicz (2003); (c)Senra et al (2002); (d)Gaw and Swinton (1968) a RK (Redlich-Kister); VL (van Laar); W (Wilson) Regions of occurrence of positive and negative azeotropes in binary systems at fi xed T according to criteria (5) and(7). (note change of variables in lower left and upper right fi elds)…”