Experimental study of the speed of sound in Dowtherm vapor

Timrot, D. L.; Serednitskaya, M. A.; Alekseev, N. N.

doi:10.1007/bf00860905

Cited by 4 publications

(7 citation statements)

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“…Using the viscosity and well-depth data, the pD\ \ for acetic is given by 105pDu = 1.255 X 10"3 2 + 1.527 X 10-2 (cal cm-1 s~') (12) The pD\ i for trifluoroacetic acid is given by 105pZ>n = 8.091 X 10-4 2 -6.010 X 10-3 (cal cm-1 s_1) (13…”

Section: Discussionmentioning

confidence: 99%

Vapor phase association in acetic and trifluoroacetic acids. Thermal conductivity measurements and molecular orbital calculations

Frurip¹,

Curtiss²,

Blander³

1980

J. Am. Chem. Soc.

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Thermal conductivity measurements are reported for the vapors of acetic acid and trifluoroacetic acid in the temperature range 350-415 K over the pressure range Torr. Very large enhancements of the thermal conductivity were found and analysis of the data is consistent with a monomer-dimer equilibrium for both vapors. The standard thermodynamic parameters for the dimerization reactions are -AH2 = 14.64 kcal mol-1 and -AS2 = 35.50 cal mol-1 K_1 for acetic acid, and -AH2 = 13.66 kcal mol™"1 and -AS2 = 36.15 cal mol-1 K_1 for trifluoroacetic acid. No evidence was found for the presence of significant amounts of associated species larger than the dimer. Ab initio molecular orbital calculations were performed on the monomers and dimers of both acids to determine the lowest energy structures. Both dimers are found to contain two nearly parallel C=0-H-O hydrogen bonds.

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Section: Discussionmentioning

confidence: 99%

Vapor phase association in acetic and trifluoroacetic acids. Thermal conductivity measurements and molecular orbital calculations

Frurip¹,

Curtiss²,

Blander³

1980

J. Am. Chem. Soc.

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“…Bonilla, Wang, and Weiner V11 used Vasilesco's viscosity values 9 as a calibrating standard, but these are considered incorrect now. However, Bonilla~s ratios of the viscosities of the vapors of heavy water and ordinary water seemed to be worthy of consideration. The data by Timrot, Serednitskaya, and Bespalov (1974) v 13 were obtained by means of an oscillating disk viscometer. These measurements are considered to be among the most precise in this region.…”

Section: Gaseous Phasementioning

confidence: 99%

Transport Properties of Liquid and Gaseous D2O over a Wide Range of Temperature and Pressure

Matsunaga

Nagashima

1983

Journal of Physical and Chemical Reference Data

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Centroid molecular dynamics approach to the transport properties of liquid para-hydrogen over the wide temperature range High-pressure vessel for elastic and inelastic x-ray diffraction experiments for liquids over a wide temperature range Rev. Sci. Instrum. 72, 1721 (2001); 10.1063/1.1338487 HTP kinetics studies of the reactions of O(2 3 P J ) atoms with H2 and D2 over wide temperature ranges J. Chem. Phys. 87, 6988 (1987); 10.1063/1.453395Ion identity and transport properties in CO2 over a wide pressure range Data for the viscosity and thermal conductivity of dense gaseous and liquid heavy water (D20) have been reviewed and critically evaluated. Selected data were fitted to equations, from which tables of values were generated from temperatures up to 500 °C and for pres--sur-es-up-to--lOO-MPafor-the-viscosity-and--up-tu-550-oeanol-oo-MPa for tlietherma[ conductivity. The uncertainties of the tabular values were estimated. The present paper is intended to explain the background of the International Representations of the Viscosity and Thermal Conductivity of Heavy Water Substance of the International Association for the Properties of Steam. With the aid of the present correlations, the kinematic viscosity, thermal diffusivity, and Prandtl number have been calculated. The present status of the gaseous diffusion coefficient is also briefly reviewed.

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“…[62] quite accurately. The deviations are AAD = 0.25% (MAD = 0.63%) and AAD = 0.37% (MAD = 1.4%), respectively, while the claimed uncertainty for the experimental data is less than 0.2%.…”

Section: Thermodynamic Properties Of Mixturesmentioning

confidence: 91%

“…It must be noted that two experimental points (T = 505.15 K, p = 0.060 MPa, and T = 633.15 K, p = 0.619 MPa) were left out of this comparison because both models predict a liquid state at the given pressures and temperatures, while Ref. [62] provides speeds of sound that represent values which are in the superheated vapor state. Fig.…”

Section: Thermodynamic Properties Of Mixturesmentioning

confidence: 99%

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Technical equation of state models for heat transfer fluids made of biphenyl and diphenyl ether and their mixtures

Stelt

Casati

Chan

et al. 2015

Fluid Phase Equilibria

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Experimental study of the speed of sound in Dowtherm vapor

Cited by 4 publications

References 0 publications

Vapor phase association in acetic and trifluoroacetic acids. Thermal conductivity measurements and molecular orbital calculations

Vapor phase association in acetic and trifluoroacetic acids. Thermal conductivity measurements and molecular orbital calculations

Transport Properties of Liquid and Gaseous D2O over a Wide Range of Temperature and Pressure

Technical equation of state models for heat transfer fluids made of biphenyl and diphenyl ether and their mixtures

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