Second virial coefficients, critical temperatures, and the molecular shapes of long n‐alkanes

1996 ◽  
Vol 105 (10) ◽  
pp. 4223-4233 ◽  
Author(s):  
Carlos Vega ◽  
Antonio López Rodríguez
Keyword(s):  
Virial Coefficients ◽  
Critical Temperatures ◽  
Second Virial Coefficients

Upper critical solution temperatures of hydrocarbon + fluorocarbon mixtures

1978 ◽  
Vol 31 (1) ◽  
pp. 19 ◽  
Author(s):  
CP Hicks ◽  
RL Hurle ◽  
LS Toczylkin ◽  
CL Young
Keyword(s):  
Reasonable Agreement ◽  
Fluid Model ◽  
Virial Coefficients ◽  
Temperature Data ◽  
Solution Temperature ◽  
Critical Temperatures ◽  
Critical Solution Temperature ◽  
Second Virial Coefficients ◽  
Upper Critical Solution Temperature ◽  
Critical Solution Temperatures

Values of the interaction parameter ξ have been calculated from upper critical solution temperature data by use of the van der Waals one- fluid model for a range of hydrocarbon+fluorocarbon mixtures. The values obtained are compared with values calculated from gas-liquid critical temperatures and mixed second virial coefficients where experimental data on these properties are available. The overall agreement between calculated from these properties is only fair but there is reasonable agreement between ξ calculated from gas-liquid critical temperatures and upper critical solution temperatures for mixtures of quasi-spherical molecules. ��� Experimental upper critical solution temperatures are reported for 26 systems which have not been studied previously. Gas-liquid critical temperatures of four systems are reported.

Excess second virial coefficients and critical temperatures: Acetone+ methyl acetate

AIChE Journal ◽  
1983 ◽  
Vol 29 (6) ◽  
pp. 1007-1010 ◽  
Author(s):  
P. J. McElroy ◽  
H. Hashim ◽  
Wong Loke Tatt
Keyword(s):  
Methyl Acetate ◽  
Virial Coefficients ◽  
Critical Temperatures ◽  
Second Virial Coefficients

The Bender Equation of State and Virial Coefficients

2000 ◽  
Vol 65 (9) ◽  
pp. 1464-1470 ◽  
Author(s):  
Anatol Malijevský ◽  
Tomáš Hujo
Keyword(s):  
Equation Of State ◽  
Virial Coefficient ◽  
Virial Coefficients ◽  
Low Density ◽  
Second Virial Coefficients ◽  
The Third ◽  
Temperature Dependences ◽  
Experimental Values

The second and third virial coefficients calculated from the Bender equation of state (BEOS) are tested against experimental virial coefficient data. It is shown that the temperature dependences of the second and third virial coefficients as predicted by the BEOS are sufficiently accurate. We conclude that experimental second virial coefficients should be used to determine independently five of twenty constants of the Bender equation. This would improve the performance of the equation in a region of low-density gas, and also suppress correlations among the BEOS constants, which is even more important. The third virial coefficients cannot be used for the same purpose because of large uncertainties in their experimental values.

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