Mass effect on the Soret coefficient in n-alkane mixtures

Journal Article · Fri Feb 28 00:00:00 EST 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4865936· OSTI ID:22255083

Alonso de Mezquia, David; Madariaga, J. Antonio; Santamaría, Carlos ^[1]

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1. Department of Applied Physics II, University of Basque Country (UPV/EHU), Apdo. 644, 48080 Bilbao (Spain)

We have determined the Soret coefficient of different equimolar and non equimolar n-alkane mixtures from measurements of the molecular diffusion and thermal diffusion coefficients. It is shown that equimolar mixtures behave as isotopic-like mixtures in which only the mass effect contributes to the Soret effect. In non equimolar mixtures, a small linear dependence with the molar fraction is observed. Finally, we have obtained a new correlation, which allows the determination of the Soret coefficient of n-alkane mixtures using the data of viscosity, the thermal expansion coefficient of the pure components, and the density of the equimolar mixture.

• OSTI ID: 22255083
• Journal Information: Journal of Chemical Physics, Vol. 140, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKANES
DENSITY
MIXTURES
THERMAL DIFFUSION
THERMAL EXPANSION
VISCOSITY