Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Measurements of the speed of sound in liquid and supercritical ethane

Hawary, A. E., Meier, K.
Fluid Phase Equilib. 2016, 418, 125-132
ABSTRACT
Comprehensive and accurate measurements of the speed of sound in pure ethane have been carried out in the liquid and supercritical regions by a double-path-length pulse-echo technique. The measured data cover the temperature range from 240 K to 420 K with pressures up to 100 MPa. The expanded measurement uncertainties at the 95% confidence level amount to 2.1 mK for temperature, 0.007% for pressure, and 0.01% for speed of sound with the exception of a few state points in the vicinity of the critical point, where the uncertainty increases up to 0.016%. The quality of the measurements is demonstrated by comparisons with literature data and the fundamental equation of state for ethane by D. Bucker and W. Wagner [J. Phys. Chem. Ref. Data 35 (2006) 205-266].
Compounds
# Formula Name
1 C2H6 ethane
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
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Frequency, MHz; Liquid
  • Liquid
  • Dual path-length method
  • 105
  • POMD
  • 1
  • Speed of sound, m/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Frequency, MHz; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Dual path-length method
  • 137