Global thermodynamic behavior of fluid mixtures in the critical region

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review E; (United States)

DOI:https://doi.org/10.1103/PhysRevE.47.388· OSTI ID:6899267

Jin, G X; Tang, S ^[1]; Sengers, J V ^[2]

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1. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States)
2. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States) Thermophysics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)

In a previous publication [Z. Y. Chen, A. Abbaci, S. Tang, and J.V. Sengers, Phys. Rev. A 42, 4470 (1990)] a renormalized Landau expansion was constructed for the thermodynamic free energy of one-component fluids that incorporates the crossover from singular thermodynamic behavior at the critical point to regular behavior far away from the critical point. In the present paper the approach is extended to obtain a crossover free energy for binary fluid mixtures in the region around the vapor-liquid critical line. The thermodynamic equations thus obtained are compared with experimental equation-of-state and specific-heat data for mixtures of carbon dioxide and ethane.

• DOE Contract Number: FG05-88ER13902
• OSTI ID: 6899267
• Journal Information: Physical Review E; (United States), Journal Name: Physical Review E; (United States) Vol. 47:1; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKANES
BINARY MIXTURES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CRITICAL TEMPERATURE
DISPERSIONS
ENERGY
ETHANE
FREE ENERGY
HYDROCARBONS
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPOR CONDENSATION