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

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.

ABSTRACT