Ebulliometric measurement of the vapor pressure of difluoromethane

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Journal of Chemical and Engineering Data; (United States)

DOI:https://doi.org/10.1021/je00010a018· OSTI ID:6784140

Weber, L A; Goodwin, A R.H. ^[1]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)

The authors have used a comparative ebulliometer to make accurate measurements of the vapor pressure of difluoromethane (R32) in the range 49-214 kPa, which corresponds to temperatures on ITS-90 between 208 and 237 K. The results are represented with an Antoine equation and are compared with literature values. They have combined their results with literature values, and present an interpolating equation for the vapor pressure at temperatures between 190 K and the critical temperature (351.36 K). They also tabulate thermodynamic properties for R32 on the saturation boundary 200 and 250 K.

• DOE Contract Number: AI05-88ER13823
• OSTI ID: 6784140
• Journal Information: Journal of Chemical and Engineering Data; (United States), Journal Name: Journal of Chemical and Engineering Data; (United States) Vol. 38:2; ISSN JCEAAX; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
FLUIDS
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
REFRIGERANTS
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
WORKING FLUIDS