Abstract
FRANKS and Johnson1 recently developed a computer method for the accurate determination of partial molar quantities from the measured total properties of binary systems. In their treatment of the volume of aqueous ethyl alcohol solutions, an unexpectedly complex and apparently anomalous variation of the ethyl alcohol partial molar volume was revealed at 0.06 alcohol mole fraction over the temperature-range 0°–30° C. In addition to the known2 increase of the water solvent partial molar volume and the decrease of the alcohol partial molar volume to a minimum at about 0.08 alcohol mole fraction, the alcohol partial molar volume-concentration contour furnished1 a hitherto unobserved change in course at 0.06 alcohol mole fraction appearing as a shoulder at 10° C. which progressively developed with increasing temperature to furnish a small but definite peak at 30° C.
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References
Franks, F., and Johnson, H. H., Trans. Farad. Soc., 58, 656 (1962).
Mitchell, A. G., and Wynne-Jones, W. F. K., Disc. Farad. Soc., No. 15, 161 (1953).
Glew, D. N., J. Phys. Chem., 66, 605 (1962).
Stackelberg, M. von, and Müller, H. R., Z. Elektrochem., 58, 25 (1954).
Pickering, S. U., Trans. Chem. Soc., 63, 141 (1893).
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GLEW, D. Solution Hydrates of Aqueous Non-electrolytes. Nature 195, 698–699 (1962). https://doi.org/10.1038/195698a0
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DOI: https://doi.org/10.1038/195698a0
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