Physicochemical Properties of Mixtures of Morama Seed Oil With Alkanols and Alkyl Acetates at 298.15 K Atmospheric Pressure |
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| Authors: | Samuel O. Yeboah Isaac Oathotse Wilfred A. A. Ddamba |
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| Affiliation: | Department of Chemistry, University of Botswana, Corner of Mobutu and Notwane Streets, Gaborone, Botswana |
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| Abstract: | Densities, ρ, ultrasonic speed, u, and dynamic viscosities, η, of mixtures of morama, Tylosema esculentum, seed oil with 1‐propanol, 1‐butanol, methyl acetate, and ethyl acetate were determined over the entire composition range at 298.15 K and atmospheric pressure. Excess molar volumes,  , excess molar‐free volumes  , deviations in isentropic compressibility, Δκs, deviations in ultrasonic speed, Δu, deviations in dynamic viscosity, Δη, and the excess free energy of activation of viscous flow, ΔG*E, were calculated and correlated using the Redlich–Kister equation for each of the (morama seed oil + 1‐propanol or 1‐butanol or methyl acetate or ethyl acetate) mixtures. The results obtained were discussed in terms of possible dipole–dipole intermolecular interactions and structural effects. |
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| Keywords: | 1‐Alkanols Alkyl acetate Excess molar volume Dynamic viscosity Isentropic compressibility Morama seed oil |
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, excess molar‐free volumes 
, deviations in isentropic compressibility, Δκs, deviations in ultrasonic speed, Δu, deviations in dynamic viscosity, Δη, and the excess free energy of activation of viscous flow, ΔG*E, were calculated and correlated using the Redlich–Kister equation for each of the (morama seed oil + 1‐propanol or 1‐butanol or methyl acetate or ethyl acetate) mixtures. The results obtained were discussed in terms of possible dipole–dipole intermolecular interactions and structural effects.