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Hydration of urea and its derivatives – Volumetric and compressibility studies

Authors
Journal
The Journal of Chemical Thermodynamics
0021-9614
Publisher
Elsevier
Volume
79
Identifiers
DOI: 10.1016/j.jct.2014.07.012
Keywords
  • Apparent Molar Volume
  • Apparent Molar Isentropic Compression
  • Urea
  • Hydration
  • N-Alkyl Urea
  • N
  • N-Dialkylurea

Abstract

Abstract The densities and sound velocities at T=(288.15, 293.15, 298.15, 303.15 and 308.15)K have been measured for aqueous solutions of urea, N,N-dimethylurea, N,N-diethylurea, N-propylurea, N-butylurea. From these data the apparent molar volumes, VΦ, the apparent molar isentropic compressions, KS,Φ, and the Passynski solvation numbers of solutes have been determined. The concentration dependencies of the calculated quantities, their limiting values and temperature characteristics are discussed in terms of (solute+solvent) and (solute+solute) interactions.

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