Isobaric heat capacity for liquid 1-chloro-1,1-difluoroethane and 1,1-difluoroethane
- Keio Univ., Yokohama (Japan). Dept. of Mechanical Engineering
The isobaric heat capacities (C[sub P]) for liquid 1-chloro-1,1-difluoroethane (HCFC-142b) and 1,1-difluoroethane (HFC-152a) have been measured by means of flow calorimetry. For HCFC-142b, 31 C[sub P] values have been measured at temperatures from 276 to 350 K and pressures from 1.0 to 3.0 MPa. For HFC-152a, 36 C[sub P] have been measured at temperature from 276 to 360 K and pressures from 1.0 to 3.2 MPa. The uncertainties are estimated as [plus minus] 13 mK in temperature, [plus minus]3 kPa in pressure, and [plus minus] kPa in pressure, and [plus minus]0.4% for most of the C[sub P] measurements. The purity of samples used for both HCFC-142b and HFC-152a measurements was 99.95 mol%. Correlations of liquid C[sub P] as a function of temperature and pressure have been developed for both refrigerants on the basis of the measurements.
- OSTI ID:
- 6045685
- Journal Information:
- Journal of Chemical and Engineering Data; (United States), Journal Name: Journal of Chemical and Engineering Data; (United States) Vol. 38:1; ISSN JCEAAX; ISSN 0021-9568
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACCURACY
CALORIMETRY
CHLOROFLUOROCARBONS
FLUIDS
LAYERS
MATERIAL SUBSTITUTION
MEDIUM PRESSURE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OZONE LAYER
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
REFRIGERANTS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES
WORKING FLUIDS