Vapor pressures of new fluorocarbons
- Kobe Univ. (Japan)
The vapor pressures of four fluorocarbons have been measured at the following temperature ranges: R123 (2,2-dichloro-1,1,1-trifluoroethane), 273-457 K; R123a (1,2-dichloro-1,1,2-trifluoroethane), 303-458 K; R134a (1,1,1,2-tetrafluoroethane), 253-373 K; and R132b (1,2-dichloro-1,1-difluoroethane), 273-398 K. Determinations of the vapor pressure were carried out by a constant-volume apparatus with an uncertainty of less than 1.0%. The vapor pressures of R123 and R123a are very similar to those of R11 over the whole experimental temperature range, but the vapor pressures of R134a and R132b differ somewhat from those of R12 and R113, respectively, as the temperature increases. The numerical vapor pressure data can be fitted by an empirical equation using the Chebyshev polynomial with a mean deviation of less than 0.3%.
- OSTI ID:
- 5523932
- Report Number(s):
- CONF-880606--
- Journal Information:
- International Journal of Thermophysics; (USA), Journal Name: International Journal of Thermophysics; (USA) Vol. 10:3; ISSN 0195-928X; ISSN IJTHD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BOILING POINTS
CHLORINATED ALIPHATIC HYDROCARBONS
COMPARATIVE EVALUATIONS
CRITICAL PRESSURE
CRITICAL TEMPERATURE
ENVIRONMENTAL EFFECTS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FREONS
FUNCTIONS
HALOGENATED ALIPHATIC HYDROCARBONS
LAYERS
MATERIAL SUBSTITUTION
MATERIALS TESTING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OZONE LAYER
PHYSICAL PROPERTIES
POLLUTION ABATEMENT
POLYNOMIALS
PRESSURE MEASUREMENT
REFRIGERANTS
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPOR PRESSURE
WORKING FLUIDS