Study of molar volume and refraction in of triglyceride (triacetin, tributyrin or tricaprylin) -alcohol (ethanol, 1-butanol or 1-hexanol) mixtures
Keywords:Alcohol, Miscella, Molar refraction, Molar volume, Triglyceride
Values of molar refraction for every studied mixtures show linear plots versus molar fractions of triglyceride. Values of molar volume show this behaviour, but only for tributyrin-butanol or tricaprylin-butanol miscellas. However, in tributyrin-ethanol mixtures, volume contractions have been found, whereas triacetin-butanol and tributyrin-hexanol show volume expansions. These facts are related to the mode of being structured of the alcohol and triglyceride molecules in mixtures. A linear relationship between molar volume and temperature have been found, and also a linear dependence between the coefficient of thermal expansion at constant pressure and the molar fraction of triglyceride.
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