ISSN:
1572-9567
Keywords:
Burnett apparatus
;
chlorodifluoromethane (R22)
;
ebulliometry
;
refrigerants
;
1,1,1,2-tetrafluoroethane (R134a)
;
vapor pressure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We measured the vapor pressure of chlorodifluoromethane (commonly known as R22) at temperatures between 217.1 and 248.5 K and of 1,1,1,2-tetrafluoroethane (commonly known as R134a) in the temperature range 214.4 to 264.7 K using a comparative ebulliometer. For 1,1,1,2-tetrafluoroethane at pressures between 220.8 and 1017.7kPa (corresponding to temperatures in the range 265.6 to 313.2K), additional measurements were made with a Burnett apparatus. We have combined our results for 1,1,1,2-tetrafluoroethane with those already published from this laboratory at higher pressures to obtain a smoothing equation for the vapor pressure from 215 K to the critical temperature. For chlorodifluoromethane our results have been combined with certain published results to provide an equation for the vapor pressure at temperatures from 217 K to the critical temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00503911
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