Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

An Experimental Study of the pVTx Properties for Aqueous Solutions of Ammonia Focusing on the Maximum Density Region1

Oguchi, K., Ibusuki, Y.
Int. J. Thermophys. 2005, 26, 6, 1709-1719
ABSTRACT
An experimental study of the pressure volume temperature-composition (pV T x) properties for the aqueous solution of ammonia, namely NH3 H2O mixtures, has been conducted with the use of a constant-volume apparatus, especially focusing on the maximum density behavior, in the range of temperatures from 253 to 309 K, pressures from 0.47 to 16.93MPa, densities from 950 to 1007 kg *m-3 and compositions from 0 to 0.1436 mole fraction of ammonia. The behavior of the maximum densities for the aqueous solution of ammonia has been investigated for the first time by the present experimental study, and the available equations of state do not represent the pVTx properties of the present measured data adequately near the maximum density region.
Compounds
# Formula Name
1 H3N ammonia
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
  • 2
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Constant-volume piezometry
  • 42
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Constant-volume piezometry
  • 277