Measurements of the speed of sound in seven halogenated hydrocarbons are presented. The compounds in this study are 1-chloro-1,2,2,2-tetrafluoroethane (CHClFCF3 or HCFC-124), pentafluoroethane (CHF2 CF3 or HFC-125), 1,1,1-trifluoroethane (CF3CH3 or HFC-143a), 1,1-difluoroethane (CHF2CH3 or HFC-152a), 1,1,1,2,3,3-hexafluoropropane (CF3CHFCHF2 or HFC-236ea), 1,1,1,3,3,3-hexafluoropropane (CF3CH2CF3 or HFC-236fa), and 1,1,2,2,3-pentafluoropropane (CHF2CF2CH2F or HFC-245ca). The measurements were performed with a cylindrical resonator at temperatures between 240 and 400 K and at pressures up to 1.0 MPa. Ideal-gas heat capacities and acoustic virial coefficients were directly deduced from the data. The ideal-gas heat capacity of HFC-125 from this work differs from spectroscopic calculations by less than 0.2% over the measurement range. The coefficients for virial equations of state were obtained from the acoustic data and hard-core square-well intermolecular potentials. Gas densities that were calculated from the virial equations of state for HCFC-124 and HFC-125 differ from independent density measurements by at most 0.15%, for the ranges of temperature and pressure over which both acoustic and Burnett data exist. The uncertainties in the derived properties for the other five compounds are comparable to those for HCFC-124 and HFC-125.
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M. R. Moldover, M. Waxman, and M. Greenspan.High Temp. High Press. 11:75 (1979).
J. B. Mehl and M. R. Moldover,J. Chem. Phys. 74:4062 (1981).
J. B. Mehl and M. R. Moldover, inProc. Eighth Symp. Thermophys. Prop. J. V. Sengers, ed. (ASME, New York, 1982), pp. 134–141.
M. R. Moldover, J. B. Mehl, and M. Greenspan,J. Acoust. Soc. Am. 79:253 (1986).
M. R. Moldover, J. P. M. Trusler, T. J. Edwards, J. B. Mehl, and R. S. Davis,J. Res. Natl. Bur. Stand. 93:85 (1988).
J. P. M. Trusler,Physical Acoustics and Metrology of Fluids (Adam Hilger, Bristol, 1991).
NIST Thermodynamic Properties of Refrigerants and Refrigerant Mixtures, NIST Standard Reference Database 23 (Standard Reference Data Program. NIST, Gaithersburg, MD).
A. R. H. Goodwin and M. R. Moldover,J. Chem. Phys. 93:2741 (1990).
A. R. H. Goodwin and M. R. Moldover,J. Chem. Phys. 95:5230 (1991).
A. R. H. Goodwin and M. R. Moldover,J. Chem. Phys. 95:5236 (1991).
Apparatus for Acoustic Measurements of Gases with Applications for High K. A. Gillis and M. R. Moldover, inProceedings of the Ninth Symposium on Energy Engineering Sciences (Argonne National Laboratory, May 13–15, 1991), p. 310.
D. Defibaugh, K. A. Gillis, M. R. Moldover, G. Morrison, and J. W. Schmidt,Fluid Phase Equil. 81:285 (1992).
K. A. Gillis,Int. J. Thermophys. 15:821 (1994).
K. A. Gillis, A. R. H. Goodwin, and M. R. Moldover,Rev. Sci Instrum. 62:2213 (1991).
W. Van Dael, inIUPAC Series in Experimental Thermodynamics, Vol. 2: Experimental Thermodynamics of Non-reacting Fluids, B. Le Neindré and B. Vodar, eds. (Butterworths, London, 1975) Chap. 11.
K. A. Gillis and M. R. Moldover,Int. J. Thermophys. 17:1305 (1996).
J. P. M. Trusler and M. Zarari,J. Chem. Thermodyn. 24:973 (1992).
G. C. Maitland, M. Rigby, E. B. Smith, and W. A. Wakeham.Intermolecular Forces (Clarendon Press, Oxford, 1981).
E. M. Sevick and P. A. Monson,J. Chem. Phys. 94:3070 (1991).
J. W. S. Rayleigh,Theory of Sound (Dover, New York, 1945).
R. C. Reid, J. M. Prausnitz, and B. E. Poling,The Properties of Gases and Liquids, 4th ed. (McGraw-Hill, New York, 1987) Chaps. 9, 10.
D. Reichenberg,AIChE J. 21:181 (1975).
S. J. Boyes and L. A. Weber,Int. J. Thermophys. 15:443 (1994).
TRC Thermodynamic Tables—Non-Hydrocarbons, Table v-6881, J. Chao and A. S. Rodger, compilers (Thermodynamics Research Center, The Texas A&M University System, College Station, 1989).
S. S. Chen, A. S. Rodgers, J. Chao, R. C. Wilhoit, and B. J. Zwolinski,J. Chem. Ref. Data 4:441 (1975).
D. A. Compton and D. M. Rayner,J. Phys. Chem. 86:1628 (1982).
B. Beagley, M. O. Jones, and P. Yavari,J. Mol. Struct. 71:203 (1981).
C. M. Bignell and P. J. Dunlop,J. Chem. Phys. 98:4889 (1993).
S. J. Boyes and L. Weber,J. Chem. Thermodyn. 27:163 (1995).
T. J. Buckley and K. A. Gillis.J. Chromatogr. A 702:243 (1995).
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Gillis, K.A. Thermodynamic properties of seven gaseous halogenated hydrocarbons from acoustic measurements: CHClFCF3, CHF2 CF3, CF3 CH3, CHF2CH3, CF3CHFCHF2, CF3CH2CF3, and CHF2CF2CH2F. Int J Thermophys 18, 73–135 (1997). https://doi.org/10.1007/BF02575203
- equation of state
- heat capacity
- speed of sound
- thermodynamic properties
- virial coefficient