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Ultrasonic Speeds and Volumetric Properties of Dipropylene Glycol Monomethyl Ether–n-Alkylamine Mixtures at 298.15 K

  • A. Pal and R. K. Bhardwaj
Published/Copyright: September 25, 2009
Zeitschrift für Physikalische Chemie
From the journal Volume 216 Issue 9

The excess molar volume and ultrasonic speed have been measured in dipropylene glycol monomethyl ether + butylamine, dibutylamine, and tributylamine across the entire composition range, at the temperature 298.15 K and atmospheric pressure. The ultrasonic speed values have been combined with those of the excess molar volumes converted to densities to give estimates of the product KS,m of the molar volumes and isentropic compressibility κS and the excess quantity KS,mE. The excess volumes are negative over the entire range of composition for all mixtures with the exception of tributylamine. The KS,mE values are negative for all mixtures. The deviation of the speeds of sound uD from their ideal values uid in an ideal mixture were also calculated for all measured mole fractions. Graphs of VmE, u, uD, and KS,mE against composition are presented as a basis for a qualitative discussion of the results.

Published Online: 2009-09-25
Published in Print: 2002-09
Downloaded on 27.10.2025 from https://www.degruyterbrill.com/document/doi/10.1524/zpch.2002.216.9.1033/html
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