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

T. Hozumi; H. Sato; K. Watanabe

doi:10.1007/BF01441505

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

T. Hozumi, H. Sato, K. Watanabe

Department of System Design Engineering

Research output: Contribution to journal › Article › peer-review

7 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 language	English
Pages (from-to)	587-595
Number of pages	9
Journal	International Journal of Thermophysics
Volume	17
Issue number	3
DOIs	https://doi.org/10.1007/BF01441505
Publication status	Published - 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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10.1007/BF01441505

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

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.",

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AU - Hozumi, T.

AU - Sato, H.

AU - Watanabe, K.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - 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.

AB - 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.

KW - Alternative refrigerant

KW - HFC-125

KW - Ideal-gas specific heat

KW - Second acoustic-virial coefficient

KW - Second virial coefficient

KW - Sound velocity

KW - Spherical resonator

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

Abstract

Keywords

ASJC Scopus subject areas

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