Enthalpies of combustion, heat capacities, and enthalpies of vaporization of 1-ethylimidazole and 1-ethylpyrazole

The standard (p degrees = 0.1MPa) molar enthalpies of formation for liquid 1-ethylimidazole and 1-ethylpyrazole were derived from the standard molar e nthalpies of combustion Delta cHm degrees in oxygen, at T = 298.15 K, measu red by static bomb combustion calorimetry. The molar heat capacities of bot h liquids were measured in the temperature range (280 to 365)K by different ial scanning calorimetry. The standard molar enthalpies of vaporization Del ta lgHm degrees, at the temperature T = 298.15K were measured by Calvet mic rocalorimetry. The derived standard molar enthalpies of formation in the ga seous state are compared. [GRAPHICS] (C) 1999 Academic Press.