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

Journal Article · Wed May 01 00:00:00 EDT 1996 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF01441505· OSTI ID:471824

Hozumi, T; Sato, H; Watanabe, K ^[1]

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1. Keio Univ., Yokohama (Japan)

The sound velocity in gaseous pentafluoroethane (HFC-125, CF{sub 3}CHF{sub 2}) has been measured by means of a spherical acoustic resonator. Seventy-two sound-velocity values were measured with an uncertainty of {plus_minus}0.01% at temperatures form 273 to 343 K and pressures form 10 to 250 kPa. 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.

• Sponsoring Organization: USDOE
• OSTI ID: 471824
• Journal Information: International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 3 Vol. 17; ISSN 0195-928X; ISSN IJTHDY
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
66 PHYSICS
ACOUSTIC MEASUREMENTS
EXPERIMENTAL DATA
FLUORINATED ALIPHATIC HYDROCARBONS
MEDIUM PRESSURE
PRESSURE DEPENDENCE
REFRIGERANTS
SOUND WAVES
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
VELOCITY
VIRIAL EQUATION