کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216943 1426290 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental thermochemical study of two chlorodinitroaniline isomers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Experimental thermochemical study of two chlorodinitroaniline isomers
چکیده انگلیسی

The standard (p∘=0.1MPa) molar enthalpies of formation of 2-chloro-4,6-dinitroaniline and 4-chloro-2,6-dinitroaniline, in the gaseous phase, at T = 298.15 K, were derived from the combination of the values of the standard molar enthalpies of formation, in the crystalline phase, and of the standard molar enthalpies of sublimation, at the same temperature. The standard molar enthalpies of formation, in the crystalline phase, were derived from the standard massic energies of combustion, in oxygen, measured by rotating-bomb combustion calorimetry. The standard molar enthalpies of sublimation were calculated, by the application of the Clausius–Clapeyron equation, to the vapour pressures at several temperatures, measured by Knudsen effusion technique.Compound-ΔfHm∘(cr)/(kJ·mol-1)ΔcrgHm∘/(kJ·mol-1)ΔfHm∘(g)/(kJ·mol-1)2-Chloro-4,6-dinitroaniline101.0 ± 1.9115.0 ± 0.914.0 ± 2.14-Chloro-2,6-dinitroaniline76.9 ± 1.8105.2 ± 0.728.3 ± 1.9Full-size tableTable optionsView in workspaceDownload as CSVThe values of the standard molar enthalpies of formation of 2-chloro-4,6-dinitroaniline and 4-chloro-2,6-dinitroaniline, in the gaseous phase, at T = 298.15 K, are discussed in terms of enthalpic increments, and the enthalpy of isomerization between the two compounds is compared with the same parameter for two isomers of chloronitroaniline, studied in previous works.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 42, Issue 4, April 2010, Pages 496–501
نویسندگان
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