Abstract
Densities of ternary water + 1-propanol + KNO3 mixtures have been measured over the temperature range from 303 to 448 K and at pressures up to 35 MPa using a constant-volume piezometer immersed in a precision liquid thermostat. The effect of salt and alcohol concentrations on the ternary mixture densities and partial molar volumes were studied. The derived volumetric property such as partial molar volumes of the salt (KNO3, \( \bar{V}_{2}^{{}} \)) and the alcohol (1-propanol, \( \bar{V}_{1}^{{}} \)) were calculated using the measured values of the densities. The volumetric behavior of the ternary mixtures was interpreted in terms of changes in the water structure caused by the added alcohol and salt. It was shown that changes in the volumetric behavior of the complex solutions are the results of the structural changes in water structure caused by solutes (alcohol and salt).
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I.M. Abdulagatov thanks the Applied Chemicals and Materials Division at the National Institute of Standards and Technology for the opportunity to work as a Guest Researcher at NIST during the course of this research.
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Abdulagatov, I.M., Akhmedova-Azizova, L.A. & Azizov, N.D. Experimental Study of the Density and Derived Partial Molar Volumes of Ternary Water + 1-Propanol + Potassium Nitrate Mixtures at Temperatures from (303 to 448) K and Pressures up to 35 MPa. J Solution Chem 43, 2045–2066 (2014). https://doi.org/10.1007/s10953-014-0252-6
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DOI: https://doi.org/10.1007/s10953-014-0252-6