Speed of Sound in Gaseous Difluoromethane

Tsutomu Hozumi; Haruki Sato; Koichi Watanabe

doi:10.1021/je00015a020

Speed of Sound in Gaseous Difluoromethane

Tsutomu Hozumi, Haruki Sato, Koichi Watanabe

Department of System Design Engineering

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

32 Citations (Scopus)

Abstract

The speed of sound in gaseous difluoromethane (HFC-32, CH₂F₂) has been measured by means of a spherical acoustic resonator. Sixty-seven speed of sound values were measured with an accuracy of ±0.01 % at temperatures from 273 to 343 K and pressures from 20 to 250 kPa. The ideal-gas specific heats and the second acoustic virial coefficients have been determined on the basis of the speed of sound measurements. The second virial coefficients calculated from the present speed of sound measurements agree satisfactorily with literature values which were determined from pressure-volume-temperature measurements.

Original language	English
Pages (from-to)	493-495
Number of pages	3
Journal	Journal of Chemical and Engineering Data
Volume	39
Issue number	3
DOIs	https://doi.org/10.1021/je00015a020
Publication status	Published - 1994 Jul 1

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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N2 - The speed of sound in gaseous difluoromethane (HFC-32, CH2F2) has been measured by means of a spherical acoustic resonator. Sixty-seven speed of sound values were measured with an accuracy of ±0.01 % at temperatures from 273 to 343 K and pressures from 20 to 250 kPa. The ideal-gas specific heats and the second acoustic virial coefficients have been determined on the basis of the speed of sound measurements. The second virial coefficients calculated from the present speed of sound measurements agree satisfactorily with literature values which were determined from pressure-volume-temperature measurements.

AB - The speed of sound in gaseous difluoromethane (HFC-32, CH2F2) has been measured by means of a spherical acoustic resonator. Sixty-seven speed of sound values were measured with an accuracy of ±0.01 % at temperatures from 273 to 343 K and pressures from 20 to 250 kPa. The ideal-gas specific heats and the second acoustic virial coefficients have been determined on the basis of the speed of sound measurements. The second virial coefficients calculated from the present speed of sound measurements agree satisfactorily with literature values which were determined from pressure-volume-temperature measurements.

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Speed of Sound in Gaseous Difluoromethane

Abstract

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