Title
Mass effect on the soret coefficient in n-alkane mixturesOther institutions
Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU)Version
Postprint
Rights
© 2014 AIP PublishingAccess
Open accessPublisher’s version
https://doi.org/10.1063/1.4865936Published at
Journal of Chemical Physics Vol. 140. Nº 8. February, 2014Publisher
AIP PublishingAbstract
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 eq ... [+]
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. [-]
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