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Asymmetric criticality in weakly compressible liquid mixtures G. Prez-Snchez,1

Summary: Asymmetric criticality in weakly compressible liquid mixtures
G. Pérez-Sánchez,1
P. Losada-Pérez,1,a
C. A. Cerdeiriña,1,b
J. V. Sengers,2,c
M. A. Anisimov2
Departamento de Física Aplicada, Universidad de Vigo, As Lagoas s/n, Ourense 32004, Spain
Department of Chemical and Biomolecular Engineering and Institute for Physical Science and Technology,
University of Maryland, College Park, Maryland 20742, USA
Received 27 January 2010; accepted 11 March 2010; published online 16 April 2010
The thermodynamics of asymmetric liquid-liquid criticality is updated by incorporating pressure
effects into the complete-scaling formulation earlier developed for incompressible liquid mixtures
C. A. Cerdeiriña et al., Chem. Phys. Lett. 424, 414 2006 ; J. T. Wang et al., Phys. Rev. E 77,
031127 2008 . Specifically, we show that pressure mixing enters into weakly compressible liquid
mixtures as a consequence of the pressure dependence of the critical parameters. The theory is used
to analyze experimental coexistence-curve data in the mole fraction­temperature,
density-temperature, and partial density­temperature planes for a large number of binary liquid


Source: Anisimov, Mikhail - Institute for Physical Science and Technology & Department of Chemical Engineering and Biomolecular Engineering, University of Maryland at College Park


Collections: Physics; Materials Science