title: Mass effect on the Soret coefficient in n-alkane mixtures.
abstract: 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.
authors.affiliation: Mechanical and Manufacturing Department, Engineering Faculty of Mondragon Unibertsitatea, Loramendi 4 Apdo. 23, 20500 Mondragon, Spain.
authors.forename: David
authors.initials: D
authors.lastname: Alonso de Mezquia
authors.affiliation: Mechanical and Manufacturing Department, Engineering Faculty of Mondragon Unibertsitatea, Loramendi 4 Apdo. 23, 20500 Mondragon, Spain.
authors.forename: M Mounir
authors.initials: MM
authors.lastname: Bou-Ali
authors.affiliation: Department of Applied Physics II, University of Basque Country (UPV/EHU), Apdo. 644, 48080 Bilbao, Spain.
authors.forename: J Antonio
authors.initials: JA
authors.lastname: Madariaga
authors.affiliation: Department of Applied Physics II, University of Basque Country (UPV/EHU), Apdo. 644, 48080 Bilbao, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Santamaría