Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

Isochoric Specific Heat Capacity of Difluoromethane (R32) and a Mixture of 51.11mass% Difluoromethane (R32) + 48.89mass% Pentafluoroethane (R125)

Matsuguchi, A., Yamaya, K., Kagawa, N.
Int. J. Thermophys. 2008, 29, 6, 1929-1938
ABSTRACT
The isochoric heat capacity (cv) of difluoromethane (R32) and a mixture of 51.11 mass% R32+48.89 mass% pentafluoroethane (R125) was measured at temperatures from 268K to 328K and at pressures up to 30MPa. The reported density measurements are in the single-phase region and cover a range of ? greater than 800 kg.m?3. Themeasured data are compared with results measured by other researchers. Also, the measured data are examined with available equations of state. As a result, it is found that the measured cv's agree well with those of other researchers in the measurement range of the present study.
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
  • Molar heat capacity at constant volume, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vacuum adiabatic calorimetry
  • 121
  • POMD
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 121
  • POMD
  • 1
  • 2
  • Molar heat capacity at constant volume, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mass fraction - 1; Liquid
  • Liquid
  • Vacuum adiabatic calorimetry
  • 194
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mass fraction - 1; Liquid
  • Liquid
  • Pycnometric method
  • 194