Volume of Mixing of Hydrocarbons Mixtures: Comparison with Theory

Experimental densities, were experimentally determined at 298.15 K for the following mixtures: (i) Binary mixtures: Cyclohexane + n-hexane, cyclohexane + n-octane, cyclohexane + n-decane, cyclohexane + n-dodecane, cyclohexane + n- hexadecane, n-hexane + n-octane, n-hexane + n- octane, n-hexane + n-decane, n-hexane + n-dodecane, and n-Hexane + n-hexadecane. (ii) Ternary mixtures: n-hexane + n-octane + cyclohexane, n- hexane + n-decane + cyclohexane, n-hexane + n- dodecane + cyclohexane, n-hexane + n-hexadecane + cyclohexane. (iii) Quaternary mixtures: n-hexane + n-octane + n-dodecane + cyclohexane. From the experimental densities , the excess molar volumes of binary, ternary, and quaternary mixtures were calculated at 298.15 K. The Prigogine-Flory-Patterson theory successfully predicted the experimental excess molar volumes for binary mixtures studied here and indicates the importance of the three contributions to excess molar volumes: interactional, free volume, and internal pressure.

Autorentext

Dr. Akl Awwad is professor of physical chemistry at Baghdad University and senoir scientist at Ministry of Science and Technology, Baghdad, Iraq. Dr. Awwad is now visiting professor at Royal Scientific Society, Amman, Jordan.

Klappentext

Experimental densities, were experimentally determined at 298.15 K for the following mixtures: (i) Binary mixtures: Cyclohexane + n-hexane, cyclohexane + n-octane, cyclohexane + n-decane, cyclohexane + n-dodecane, cyclohexane + n- hexadecane, n-hexane + n-octane, n-hexane + n- octane, n-hexane + n-decane, n-hexane + n-dodecane, and n-Hexane + n-hexadecane. (ii) Ternary mixtures: n-hexane + n-octane + cyclohexane, n- hexane + n-decane + cyclohexane, n-hexane + n- dodecane + cyclohexane, n-hexane + n-hexadecane + cyclohexane. (iii) Quaternary mixtures: n-hexane + n-octane + n-dodecane + cyclohexane. From the experimental densities , the excess molar volumes of binary, ternary, and quaternary mixtures were calculated at 298.15 K. The Prigogine-Flory-Patterson theory successfully predicted the experimental excess molar volumes for binary mixtures studied here and indicates the importance of the three contributions to excess molar volumes: interactional, free volume, and internal pressure.