The Heat Capacity, Heats of Transition, Fusion and Vaporization, Vapor Pressure and Entropy of 1,1,1-Trifluoroethane

Russell, Horace; Golding, D. R. V.; Yost, Don M.

doi:10.1021/ja01229a006

Cited by 54 publications

(13 citation statements)

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“…The results reported by Russell etal. [25] show positive systematic deviations from the present values at high temperatures, but both series converge at lower temperatures. The extrapolated values are almost identical with the values calculated from the vapor-pressure equation of Outcalt [26] at temperatures below 190 K.…”

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantssupporting

confidence: 40%

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

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A new method is presented to extrapolate experimental vapor pressures down to the triple point. The method involves a nonlinear regression analysis based on the Clausius-Clapeyron equation and a simple relation for the enthalpy of vaporization. Triple-point pressures and vapor pressures up to 0.1-0.2 MPa are estimated for R125, R32, R143a, R134a, R152a, R123, R124, and ammonia; they generally agree with available experimental data within their uncertainty. Equations for the enthalpy of vaporization which describe this property fairly well at low temperatures are obtained as a byproduct.

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Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantssupporting

confidence: 40%

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

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“…If the uncertainty of the present temperature measurements (±8 mK) is also taken into account, however, then the agreement should be considered acceptable. The deviations of the reported data (Fukushima, 1993;Russell et al, 1944;Widiatmo et al, 1994;Ye, 1993) from the equation are random, and are approximately within the claimed uncertainty of each measurement. Second.…”

Section: Discussionmentioning

confidence: 80%

“…Although the values by Beckermann and Kohler are systematically higher than the present results, the two different measurements show agreement within 2%. Equation 3 represents the second virial coefficient data given in Table 3 within ±0 Vapor-pressure deviations from eq 2: , Russell et al 1944; , Ye 1993; , Widiatmo et al 1994; *, Fukushima 1993; •, this work; -, eq 2. fitting the data given in Table 2 with the following function:…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, it has recently been proposed to use this substance in refrigeration applications as a component of promising alternative refrigerant mixtures with other HFC refrigerants such as difluoromethane (R-32), pentafluoroethane (R-125), and/or 1,1,1,2tetrafluoroethane (R-134a). Concerning its thermodynamic properties, vapor pressures and second virial coefficients were reported in the literature (Beckermann and Kohler, 1994;Fukushima, 1993;Russell et al, 1944;Widiatmo et al, 1994;Ye, 1993), but very few PVT results are available.…”

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confidence: 99%

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Vapor Pressures, Gas-Phase PVT Properties, and Second Virial Coefficients for 1,1,1-Trifluoroethane

Zhang¹,

Sato²,

Watanabe³

1995

J. Chem. Eng. Data

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The PVT properties of 1,1,1-trifluoroethane (R-143a) in the gas phase have been measured by a Burnett apparatus in the range of temperatures from 320 to 380 K and at pressures up to 6 MPa. The vapor pressures in the range of temperatures from 295 to 342 K have also been measured, and a vapor-pressure correlation has been developed. The critical pressure was determined to be (3.776 ± 0.005) MPa on the basis of the present measurements. The second virial coefficients have been determined along seven isotherms, and a truncated virial equation of state has also been developed to represent the temperature dependence of the second virial coefficients and the present Burnett PVT measurements. The experimental uncertainties of temperature, pressure, density, and second virial coefficient throughout the present study were estimated to be no more than ±8 mK, ±0.8 kPa, ±0.12%, and ±5%, respectively. The purity of the R-143a sample used was better than 99.95 mol %.

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“…The value of ΔΗ° at 298° K. was then deduced, and was compared with the experimental values, particularly those of Kistiakowski and co-workers mentioned above. (13.70) Because 1,1,1-trifluoroethane, 23 1,1,1-trichloroethane, 24 and perfluoroethane 25 show barriers of the same order as ethane (see Table 13.6), it is obvious that other atoms act in the same way as hydrogen and the empirical treatment just mentioned needs to be revised. Using the potential function of equation (13.49) with n = 3, they found that a value of V 0 equal to 3000 cal.…”

Section: Determination Of Structure From Heat Capacity and Entropymentioning

confidence: 99%

Thermodynamic Properties

Aston¹

1955

Determination of Organic Structures by Physical Methods

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The Heat Capacity, Heats of Transition, Fusion and Vaporization, Vapor Pressure and Entropy of 1,1,1-Trifluoroethane

Cited by 54 publications

References 0 publications

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Vapor Pressures, Gas-Phase PVT Properties, and Second Virial Coefficients for 1,1,1-Trifluoroethane

Thermodynamic Properties

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