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

PVTx Properties in the Gas Phase for Difluoromethane (HFC-32) + Pentafluoroethane (HFC-125)

Meng, L.[Long], Duan, Y. -Y.[Yuan-Yuan], Chen, Q.[Qi]
J. Chem. Eng. Data 2004, 49, 6, 1821-1826
ABSTRACT
Gaseous PVT property measurements for difluoromethane (HFC-32) + pentafluoroethane (HFC-125) mixtures at 0.8191 (66.25 mass %), 0.5794 (37.38 mass %) and 0.4320 (24.79 mass %) mole fractions of HFC-32 are presented. 200 PVTx data of this binary system were measured using Burnett-isochoric methods in a range of temperatures from (303.15 to 373.15) K, of pressures up to 3.246 MPa, and of densities up to 121 . The experimental uncertainties are estimated to be within ??10 mK for temperature, ??0.3 kPa for pressure, ??0.10% for density, and 0.1 mol % for composition. The temperature dependence of the second and third virial coefficients, along with the cross second and third virial coefficients, were also determined.
Compounds
# Formula Name
1 CH2F2 difluoromethane
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
  • 1
  • 2
  • Mass density, kg/m3 ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mole fraction - 1; Gas
  • Gas
  • Burnett expansion method
  • 200