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Ionic Liquids: Dissecting the Enthalpies of Vaporization
ChemPhysChem, 2008AbstractWe calculate the heats of vaporisation for imidazolium‐based ionic liquids [Cnmim][NTf2] with n=1, 2, 4, 6, 8 by means of molecular dynamics (MD) simulations and discuss their behavior with respect to temperature and the alkyl chain length. We use a force field developed recently.
Thorsten, Köddermann +2 more
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Chinese Journal of Chemical Engineering, 2014
Abstract The vapor pressures of n -butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model.
Zuoxiang Zeng +3 more
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Abstract The vapor pressures of n -butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model.
Zuoxiang Zeng +3 more
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Enthalpy of Vaporization and Vapor Pressures: An Inexpensive Apparatus
Journal of Chemical Education, 2007An inexpensive apparatus is described for the determination of the vapor pressure of a liquid as a function of temperature for the purpose of calculating enthalpy changes of vaporization. The solid-state pressure transducer is linear above 100 torr, is useful in the range -40 to 85 °C, and is calibrated using pure water.
Rubin Battino +3 more
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Vapor pressure and enthalpy of vaporization of aliphatic propanediamines
The Journal of Chemical Thermodynamics, 2012Abstract Vapor pressures of four aliphatic propanediamines including N-methyl-1,3-propanediamine (MPDA), N,N-dimethyl-1,3-propanediamine (DMPDA), N,N-diethyl-1,3-propanediamine (DEPDA) and N,N,N′,N′-tetramethyl-1,3-propanediamine (4MPDA) were measured using the transpiration method.
Sergey P. Verevkin, Yury Chernyak
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Enthalpies of vaporization of seven alkylamides
Fluid Phase Equilibria, 1985Abstract Enthalpies of vapirazation of formamide and six mono- and disubstituted N—alkylamides have been determined at 298.15 K, using a miniaturized effusion cell adapted to a commercial LKB microcalorimeter. The values obtained were consistent with those of other laboratories for other amides.
G. Barone +4 more
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Enthalpy relaxation in vapor-deposited butyronitrile
Thermochimica Acta, 1990Abstract Spontaneous enthalpy-evolution processes reported previously for vapor-deposited noncrystalline samples of solid butyronitrile were analyzed in terms of the equations of Kohlrausch, Williams and Watts (KWW), and of Adam and Gibbs (AG).
Masaharu Oguni +2 more
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Vapor pressure and enthalpy of vaporization of linear aliphatic alkanediamines
The Journal of Chemical Thermodynamics, 2011Vapor pressures and the molar enthalpies of vaporization of the linear aliphatic alkanediamines H 2 N–(CH 2 ) n –NH 2 with n = (3 to 12) have been determined using the transpiration method. A linear correlation of enthalpies of vaporization (at T = 298.15 K) of the alkanediamines with the number n and with the Kovat’s indices has been found ...
Vasiliy A. Pozdeev, Sergey P. Verevkin
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Estimation of vapor and liquid enthalpies
AIChE Journal, 1965AbstractThe Lydersen‐Greenkorn‐Hougen (L‐G‐H) charts correlating the isothermal pressure effects on enthalpy for pure compounds based on a modified corresponding states principle have been improved with the aid of reliable literature data. To facilitate machine computations, the improved charts, divided into the superheated vapor region, the subcooled ...
Lewis C. Yen, R. E. Alexander
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Vapor Pressures and Vaporization Enthalpies of a Series of Ethanolamines
Journal of Chemical & Engineering Data, 2005The vapor pressures and molar enthalpies of vaporization, Hm, of 2-amino-ethanol, 2-(methylamino)-ethanol, 2-(ethylamino)-ethanol, 2-(dimethylamino)-ethanol, and 2-(diethylamino)-ethanol have been determined using the transpiration method. The strength of intermolecular hydrogen bonding in ethanolamines has been derived and discussed in terms of the ...
Simon Kapteina +3 more
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Enthalpies of vaporization of some aliphatic alcohols
The Journal of Chemical Thermodynamics, 1971Abstract : A new calorimeter for measuring enthalpies of vaporization of pure liquids is described. Enthalpies of vaporization were determined over the temperature range 25 to 60C for the series of alcohols: methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, and tert-butanol. (Author)
Jiŕí Polák, G.C. Benson
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