Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Ebulliometric Measurement of the Vapor Pressure of Difluoromethane.
Author Weber, L. A. ; Goodwin, A. R. H. ;
CORP Author National Inst. of Standards and Technology (CSTL), Gaithersburg, MD. Thermophysics Div.;Department of Energy, Washington, DC.;Environmental Protection Agency, Washington, DC.
Publisher 1993
Year Published 1993
Stock Number PB95-151361
Additional Subjects Vapor pressure ; Fluorohydrocarbons ; Refrigerants ; Ebulliometry ; Temperature dependence ; Mathematical models ; Boiling points ; Reprints ; R32 ; Difluoromethane ; Antoine equation
Library Call Number Additional Info Location Last
NTIS  PB95-151361 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/06/1995
Collation 3p
We 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. We have combined our results with literature values, and we present an interpolating equation for the vapor pressure at temperatures between 190 K and the critical temperature (351.36 K). We also tabulate thermodynamic properties for R32 on the saturation boundary between 200 and 250 K.