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Vapour pressures and gas-phase (p, ρn, T)values for CF3CHF2(g) (R125)

✍ Scribed by S.J. Boyes; L.A. Weber

Book ID: 102968839
Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 594 KB
Volume: 27
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1995.0013

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✦ Synopsis

We present new vapour pressures and the (p, rn , T ) surface of CF3CHF2 (pentafluoroethane, designated R125 by the refrigeration industry) in the temperature range T = 273 K to 363 K. The (p, rn , T ) measurements are for the gas phase at densities up to approximately the critical density. The static vapour pressures reported here have been combined with previous ebulliometric measurements made in this laboratory at lower temperatures. Correlating equations are given for the vapour pressures from T = 220 K to the critical temperature: Tc = 339.30 K. A virial equation has been used to correlate the (p, rn , T ) surface at amountof-substance densities up to 1600 mol•m -3 . Second and third virial coefficients have been derived from the (p, rn , T ) measurements.

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