Ideal-gas specific heat and second virial coefficient of HFC-125 based on sound-velocity measurements

T. Hozumi, H. Sato, K. Watanabe

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The sound velocity in gaseous pentafluoroethane (HFC-125, CF3CHF2) has been measured by means of a spherical acoustic resonator. Seventy-two sound-velocity values were measured with an uncertainty of ±0.01% at temperatures from 273 to 343 K and pressures from 10 to 250 k Pa. The ideal-gas specific heats and the second acoustic-virial coefficients have been determined on the basis of the sound-velocity measurements. The second virial coefficients calculated from the present sound-velocity measurements agree with literature values which were determined from PVT measurements by means of a Burnett method.

Original languageEnglish
Pages (from-to)587-595
Number of pages9
JournalInternational Journal of Thermophysics
Volume17
Issue number3
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Alternative refrigerant
  • HFC-125
  • Ideal-gas specific heat
  • Second acoustic-virial coefficient
  • Second virial coefficient
  • Sound velocity
  • Spherical resonator

ASJC Scopus subject areas

  • Condensed Matter Physics

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