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Investigation of Some Physicochemical Properties of Mixtures of Morama Seed Oil with (C 6 –C 9 ) n ‐Alkanes at 298.15 and Atmospheric Pressure
Author(s) -
Yeboah S. O.,
Oathotse I.,
Ddamba W. A. A.
Publication year - 2014
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-014-2450-1
Subject(s) - heptane , nonane , octane , thermodynamics , atmospheric pressure , isentropic process , hexane , chemistry , viscosity , intermolecular force , compressibility , materials science , analytical chemistry (journal) , organic chemistry , physics , meteorology , molecule
Densities ρ , ultrasonic speeds u and dynamic viscosities η , of mixtures of morama, Tylosema esculentum , seed oil with n ‐hexane, n ‐heptane, n ‐octane and n ‐nonane were determined over the entire composition range at 298.15 K and atmospheric pressure. Excess molar volumes, V m E , excess molar free volumes V f E , deviations in isentropic compressibility, Δ κ s , deviations in ultrasonic speed, Δ u , deviations in viscosity, Δ η , and the excess free energy of activation of viscous flow, Δ G* E , were calculated therefrom and correlated by the Redlich–Kister equation for each of the [morama seed oil + ( n ‐hexane or n ‐heptane or n ‐octane or n ‐nonane)] mixtures. The results have been discussed in terms of possible intermolecular interactions and structural effects.