Experimental critical constants, vapor pressures, and vapor and liquid densities for pentafluoroethane (R-125) uri icon

abstract

  • This paper presents measurements of vapor pressure from 220 K to 338 K, liquid density from 180 K to 350 K and up to 70 MPa and vapor density from 310 K to 480 K and up to 12 MPa for pentafluoroethane (R-125). Extrapolating the observed vapor pressures to the measured critical temperature (339.41 0.01) K provides a critical pressure of (3.6391 0.002) MPa. Using these values with the law of rectilinear diameters indicates a critical density of (4768 7) molm-3. Correlations provide values which agree with the measured values for the vapor densities within 0.05%, the liquid densities within 0.1%, and the vapor pressures within 0.05%. The results are compared with values from the literature.

published proceedings

  • JOURNAL OF CHEMICAL AND ENGINEERING DATA

author list (cited authors)

  • DuarteGarza, H. A., Stouffer, C. E., Hall, K. R., Holste, J. C., Marsh, K. N., & Gammon, B. E.

citation count

  • 26

complete list of authors

  • DuarteGarza, HA||Stouffer, CE||Hall, KR||Holste, JC||Marsh, KN||Gammon, BE

publication date

  • January 1997