Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Acoustical Properties of Aqueous Solutions of Urea: Reference Data for the Ultrasonic Spectrometry of Liquids

Hagen, R., Behrends, R., Kaatze, U.[Udo]
J. Chem. Eng. Data 2004, 49, 4, 988-991
ABSTRACT
The density, sound velocity, and ultrasonic attenuation coefficient of aqueous solutions of urea were measured at temperatures between 10 ?C and 35 ?C and at concentrations ranging from 0 to 9 mol/L (=21.7 mol %) urea. The data are correlated using simple empirical expressions, and the isentropic compressibilities are calculated. These urea solutions provide a favorable set of reference data for acoustical measurements of liquids with sound velocity between 1500 m.s-1 and 1700 m.s-1.
Compounds
# Formula Name
1 CH4N2O urea
2 H2O water
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Speed of sound, m/s ; Liquid
  • Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pulse-echo method
  • 19
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid
  • Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • VIBTUB:UFactor:64
  • 19