Messung kleiner Dampfdrucke

Milazzo, G.

doi:10.1002/cite.330281006

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…The solid EOS can describe the majority of the experimental sublimation pressures within a deviation of 5%, with only six points excepted. At temperatures below 220 K, the data from Milazzo, 105 Milazzo, 117 and Miljevic et al 118 differ from the calculated sublimation pressures by up to 10%; the small pressure values in this lowtemperature region are more difficult to fit with small relative differences. The auxiliary function generally matches the EOS calculations considering the data inconsistency and model uncertainties, except at temperatures below 195 K where no data exist.…”

Section: Vmmentioning

confidence: 88%

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Xiao

Trusler

Yang

et al. 2021

Journal of Physical and Chemical Reference Data

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The thermodynamic property data for solid phase I of benzene are reviewed and utilized to develop a new fundamental equation of state (EOS) based on Helmholtz energy, following the methodology used for solid phase I of CO 2 by Trusler [J. Phys. Chem. Ref. Data 40, 043105 (2011)]. With temperature and molar volume as independent variables, the EOS is able to calculate all thermodynamic properties of solid benzene at temperatures up to 470 K and at pressures up to 1800 MPa. The model is constructed using the quasi-harmonic approximation, incorporating a Debye oscillator distribution for the vibrons, four discrete modes for the librons, and a further 30 distinct modes for the internal vibrations of the benzene molecule. An anharmonic term is used to account for inevitable deviations from the quasi-harmonic model, which are particularly important near the triple point. The new EOS is able to describe the available experimental data to a level comparable with the likely experimental uncertainties. The estimated relative standard uncertainties of the EOS are 0.2% and 1.5% for molar volume on the sublimation curve and in the compressed solid region, respectively; 8%-1% for isobaric heat capacity on the sublimation curve between 4 K and 278 K; 4% for thermal expansivity; 1% for isentropic bulk modulus; 1% for enthalpy of sublimation and melting; and 3% and 4% for the computed sublimation and melting pressures, respectively. The EOS behaves in a physically reasonable manner at temperatures approaching absolute zero and also at very high pressures.

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Section: Vmmentioning

confidence: 88%

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Xiao

Trusler

Yang

et al. 2021

Journal of Physical and Chemical Reference Data

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“…This value was used in the following calculations. The enthalpy of vaporization for this compound was determined by calorimetry, ,, from the temperature dependence of the saturated vapor pressure, − , and by correlation-gas chromatography . When the Δ l g H m o (298.15 K) values were calculated from the vapor pressure data, the original p sat ( T ) data were fitted with the Clarke–Glew equation: − R T nobreak.25em ln ( p sat p o ) = A T / θ − B [ ( T / normalθ ) − 1 ] − C [ normalθ − T + T nobreak.25em ln ( T / normalθ ) ] where θ = 298.15 K and p o = 1 bar.…”

Section: Resultsmentioning

confidence: 99%

“…The enthalpies of fusion for BuBr determined by Timmermans and Deese differ by almost 1.5 times. The consistency of the enthalpies of vaporization − and the saturated vapor pressures − is good enough to use them for the evaluation of the standard entropy of vaporization for this compound at T = 298.15 K and, if the liquid-state entropy is known, the standard entropy of gaseous BuBr.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of Ionic Liquid Precursors. 1-Bromobutane and Its Isomers

et al. 2011

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The heat capacity and parameters of fusion of 1-bromobutane (BuBr) were measured in the temperature range (5 to 370) K using adiabatic calorimetry. The thermodynamic functions for the compound in the crystal and liquid states were calculated from these data. On the basis of the experimental spectroscopic data and the results of quantum-chemical calculations, the ideal-gas properties for BuBr were calculated by methods of statistical thermodynamics. The obtained entropy S m o(g; 298.15 K) = 366.9 J·K–1·mol–1 is in excellent agreement with the value 367.0 ± 1.2 J·K–1·mol–1 obtained from the experimental data. The ideal-gas thermodynamic properties were also calculated for isomeric bromobutanes and 1-butyl-3-methylimdiazolium bromide ionic liquids that allowed us to find the changes of thermodynamic properties in the reactions of synthesis of 1-butyl-3-methylimidazolium bromide isomers. The literature data on the enthalpies of formation for isomeric bromobutanes were collected, and the recommended values were developed. It was demonstrated that the synthesis of ionic liquids from bromoalkanes and 1-methylimidazole in the gas phase, unlike the liquid-phase reaction, is not a thermodynamically favorable process. It possesses more positive enthalpy changes and more negative entropy changes compared to the synthesis in the liquid phase.

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Physical Properties of Thiophene Derivatives

Gronowitz

Hörnfeldt

1991

Chemistry of Heterocyclic Compounds: A Series of Monographs

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Messung kleiner Dampfdrucke

Cited by 13 publications

References 15 publications

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Equation of State for Solid Benzene Valid for Temperatures up to 470 K and Pressures up to 1800 MPa

Thermodynamics of Ionic Liquid Precursors. 1-Bromobutane and Its Isomers

Physical Properties of Thiophene Derivatives

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