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

Isochoric PVTx Measurements for the N2O + R125 Binary System

Di Nicola, G.[Giovanni], Giuliani, G.[Giuliano], Polonara, F.[Fabio]
J. Chem. Eng. Data 2006, 51, 6, 2041-2044
ABSTRACT
Isochoric PVTx measurements are reported for nitrous oxide (N2O, R744A) + pentafluoroethane (CHF2CF3, R125) for both the two-phase and the superheated vapor regions at temperatures ranging from (217 to 363) K and pressures from (160 to 1853) kPa along six isochores. The data obtained in the two-phase region were used to derive vapor-liquid equilibrium (VLE) parameters using a flash method with the Carnahan-Starling-De Santis equation of state (CSD EOS). The dew point was also found for each isochore from the intersection of the P-T sequences. The dew points were then used to derive VLE parameters from CSD EOS. Results from the superheated region were compared with those predicted from the virial EOS and from the CSD EOS.
Compounds
# Formula Name
1 N2O nitrous oxide
2 C2HF5 pentafluoroethane
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
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Mole fraction - 1; Gas
  • Temperature, K; Gas
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 6
  • POMD
  • 2
  • 1
  • Molar volume, m3/mol ; 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)
  • ISOCHOR
  • 116