Speed of sound in liquid tetrachloromethane and benzene at temperatures from 283.15 K to 333.15 K and pressures up to 30 MPa

Takagi, Toshiharu; Sawada, Kazuya; Urakawa, Hiroshi; Ueda, Mitsuo; Cibulka, I.

doi:10.1016/j.jct.2004.04.013

Cited by 15 publications

(8 citation statements)

References 20 publications

(35 reference statements)

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“…To investigate the authenticity of deviations plotted in the Figure, speeds of sound in liquid tetrachloromethane were also measured at (283.15, 298.15, 313.15, and 333.15) K and at pressures up to 30 MPa. 12 Obtained values were compared with data reported by Lainez et al 13 that were measured in the same laboratory as those by Ahn et al 11 The deviations (triangle data points in Figure 3) from our data are negative with a maximum deviation of less than 0.2%. The deviations originate from the difference in the speed of sound for tetrachloromethane used for the determination of the acoustic path L of our instrument (921.11 m‚s -1 ) 7 and the value reported by Lainez et al 13 (920.12 m‚s -1 ).…”

Section: Resultssupporting

confidence: 66%

“…This value corresponds to the point of a diamond shape in the deviation plot in Figure , and the deviation is naturally zero. To investigate the authenticity of deviations plotted in the Figure, speeds of sound in liquid tetrachloromethane were also measured at (283.15, 298.15, 313.15, and 333.15) K and at pressures up to 30 MPa that were measured in the same laboratory as those by Ahn et al The deviations (triangle data points in Figure ) from our data are negative with a maximum deviation of less than 0.2%.…”

Section: Resultssupporting

confidence: 48%

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Speeds of Sound in Dense Liquid and Vapor Pressures for 1,1-Difluoroethane

et al. 2004

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Speeds of sound in the liquid phase of 1,1-difluoroethane, CHF2CH3, were measured by a sing-around technique operated at a frequency of 2 MHz. The results cover the temperature range along six isotherms from (243 to 333) K and pressures from near the saturation line to about 30 MPa. The combined uncertainty is estimated to be within ±0.2% except for the region near the coexistence line in the upper temperature range. The vapor pressure was also measured with an uncertainty lower than ±20 kPa by detecting the phase change using an acoustic absorption technique. The speeds of sound in the saturated liquid were estimated by the extrapolation to the vapor pressure from those in the compressed liquid. The temperature and/or pressure effects on the speed of sound are discussed and compared with data for some other hydrofluorocarbons reported elsewhere.

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Section: Resultssupporting

confidence: 66%

Section: Resultssupporting

confidence: 48%

Speeds of Sound in Dense Liquid and Vapor Pressures for 1,1-Difluoroethane

et al. 2004

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“…They estimated “an uncertainty of 0.05 % based on the standard deviations obtained for the different fluids.” Additionally, Esperança et al also checked their calibration with measurements in acetone. In this work, we decided to examine the internal coherence of speeds of sound in benzene under high-pressure as reported in the literature − and measured in this work (Table S1 of the Supporting Information) by adopting two polynomial equations: one proposed by Sun et al (eq ) and the other suggested by Esperança et al (fitting parameters are reported in Tables S2, S3, and S4 of the Supporting Information). To enlarge the probability to find a global minimum of the least-squares fits, repeated calculations with a set of random starting values for the parameters have been performed.…”

Section: Resultsmentioning

confidence: 99%

High Pressure Speed of Sound and Related Thermodynamic Properties of 1-Alkyl-3-methylimidazolium Bis[(trifluoromethyl)sulfonyl]imides (from 1-Propyl- to 1-Hexyl-)

et al. 2016

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The knowledge of thermodynamic high-pressure speed of sound in ionic liquids (ILs) is a crucial way either to study the nature of the molecular interactions, structure and packing effects or to determine other key thermodynamic properties of ILs essential for their applications in any chemical and industrial processes. Herein, we report the speed of sound as a function temperature at pressures up to 101 MPa in four ultrapure ILs: 1-propyl-3-methylimidazolium bis-[(trifluoromethyl)sulfonyl]imide, 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, 1-pentyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, and 1-hexyl-3methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, taking into consideration their relaxation behavior. Additionally, to further improve the reliability of the speed of sound results, the density, isentropic compressibility, and isobaric heat capacity as a function of temperature and pressure are calculated using an acoustic method.

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“…The observed values at elevated pressures are consistent with the estimated values; for example, the differences are −0.3 m·s -1 and −1.1 m·s -1 at 10 MPa and 20 MPa, respectively. In our previous work, we checked the performance of our instrument by measuring the speed of sound in liquid tetrachloromethane at temperatures from 283.15 K to 333.15 K and pressures up to 30 MPa and confirmed the uncertainty in the experimental results to within ±0.2% by comparing with the selected reference data. Therefore, we assume that the uncertainty in the present results is within ±0.2%, at least in the high-density region.…”

Section: Resultsmentioning

confidence: 62%

Speed of Sound in Binary Mixtures of Pentafluoroethane and 1,1-Difluoroethane from 243.15 K to 333.15 K and Pressures up to 30 MPa

et al. 2004

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The speed of sound in the liquid phase for binary mixtures of pentafluoroethane (CHF 2 CF 3 ) and 1,1-difluoroethane (CHF 2 CH 3 ) was measured along six isotherms from (243 to 333) K and at pressures from near the saturation line up to about 30 MPa. The measurements were carried out by a sing-around technique operated at a frequency of 2 MHz employing the fixed-path acoustic interferometer. The combined uncertainty is estimated to be within (0.2% in the high-density region. The speed of sound in the saturated liquid was estimated by an extrapolation of data obtained for the compressed liquid to the vapor pressure. The results for (1 -x)CHF 2 CF 3 + xCHF 2 CH 3 measured for mole fractions x ) 0.3806, 0.6445, and 0.8447 were correlated by the polynomial equation as functions of temperature and pressure. The variations in the speed of sound with the composition at various temperatures and pressures are discussed for the system investigated as well as for (1 -x)CHF 2 CH 3 + xCF 3 CH 2 F and (1 -x)CHF 2 CH 3 + xCF 3 CH 3 reported elsewhere.

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Speed of sound in liquid tetrachloromethane and benzene at temperatures from 283.15 K to 333.15 K and pressures up to 30 MPa

Cited by 15 publications

References 20 publications

Speeds of Sound in Dense Liquid and Vapor Pressures for 1,1-Difluoroethane

Speeds of Sound in Dense Liquid and Vapor Pressures for 1,1-Difluoroethane

High Pressure Speed of Sound and Related Thermodynamic Properties of 1-Alkyl-3-methylimidazolium Bis[(trifluoromethyl)sulfonyl]imides (from 1-Propyl- to 1-Hexyl-)

Speed of Sound in Binary Mixtures of Pentafluoroethane and 1,1-Difluoroethane from 243.15 K to 333.15 K and Pressures up to 30 MPa

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