On the Vapor Pressures, Phase Transitions, and Solid-State Fluorescence of 2-(2-Hydroxyphenyl)benzoxazole and 2-(2-Hydroxyphenyl)benzothiazole.

Vapour pressures and standard molar enthalpies of sublimation of seven crystalline copper(II) β-diketonates. The mean molar (Cu-O) bond-dissociation enthalpies

Enthalpies of combustion, vapour pressures, and enthalpies of sublimation of three methoxy-nitrobenzoic acids. Vapour pressures and enthalpies of sublimation of the three nitrobenzoic acids

Phase transition study of bathophenanthroline and bathocuproine: A multitechnique approach

Standard molar enthalpy of sublimation of form I nicotinamide

Vapour pressures and standard molar enthalpies of sublimation of beryllium(II) and aluminium(III) benzoylacetonates

Aspect rhéologique de la dureté

Standard molar enthalpies of formation and of sublimation of the terphenyl isomers

Development and test of a new Knudsen effusion apparatus for the measurement of low vapour pressures

Vapour pressures and standard molar enthalpy of sublimation of crystalline tris(pentane-2,4-dionato)ruthenium(III)

Thermodynamic study of tin tetraiodide (SnI4) sublimation by effusion techniques

Vapour pressures and enthalpies of sublimation of six halogen-substituted 8-hydroxyquinolines

Enthalpies of combustion, vapour pressures, and enthalpies of sublimation of 2-cyanoquinoline and 3-cyanoquinoline

Experimental and computational thermochemical studies of 6-azauracil derivatives

Standard reference material proposed for enthalpy-of-sublimation measurements. A comparative study of the standard molar enthalpy of sublimation of Fe( c-C 5H 5) 2(ferrocene) by calorimetry and knudsen-effusion techniques

The vaporization behaviour and thermodynamics of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethyl)sulfonylimide (BMImNTf2) were studied by combining the Knudsen Effusion Mass Loss (KEML) and Knudsen Effusion Mass Spectrometry (KEMS) techniques. KEML studies were carried out in a large temperature range (398-567) K by using effusion orifices with 0.3, 1, and 3 mm diameters. The vapor pressures so measured revealed no kinetically hindered vaporization effects and provided second-law vaporization enthalpies at the mean experimental temperatures in close agreement with literature. By exploiting the large temperature range covered, the heat capacity change associated with vaporization was estimated, resulting in a value of -66.8 J K(-1) mol(-1), much lower than that predicted from calorimetric measurements on the liquid phase and theoretical calculations on the gas phase. The conversion of the high temperature vaporization enthalpy to 298 K was discussed and the value Δ(l)(g)H(m)(298 K) = (128.6 ± 1.3) kJ mol(-1) assessed on the basis of data from literature and present work. Vapor pressure data were also processed by the third-law procedure using different estimations for the auxiliary thermal functions, and a Δ(l)(g)H(m)(298 K) consistent with the assessed value was obtained, although the overall agreement is sensitive to the accuracy of heat capacity data. KEMS measurements were carried out in the lower temperature range (393-467) K and showed that the largely prevailing ion species is BMIm(+), supporting the common view of BMImNTf2 vaporizing as individual, neutral ion pairs also under equilibrium conditions. By monitoring the mass spectrometric signal of this ion as a function of temperature, a second-law Δ(l)(g)H(m)(298 K) of 129.4 ± 7.3 kJ mol(-1) was obtained, well consistent with KEML and literature results. Finally, by combining KEML and KEMS measurements, the electron impact ionization cross section of BMIm(+) was estimated.