کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216329 1426282 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Standard molar enthalpies of formation of monochloroacetophenone isomers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Standard molar enthalpies of formation of monochloroacetophenone isomers
چکیده انگلیسی
The standard (p∘=0.1MPa) molar enthalpies of formation of the liquids 2′-, 3′-, and 4′-chloroacetophenones were derived from the standard molar energies of combustion, in oxygen, to yield CO2(g) and HCl · 600H2O(l), at T = 298.15 K, measured by rotating-bomb combustion calorimetry. The Calvet microcalorimetry was used to measure the enthalpies of vaporization of the three compounds. These two thermodynamic parameters yielded the standard molar enthalpies of formation of the chloroacetophenone isomers, in the gaseous phase, at T = 298.15 K.CompoundΔcu∘/(J·g-1)ΔfHm∘(g)/(kJ·mol-1)2′-Chloroacetophenone−25939.6 ± 2.7−99.4 ± 2.13′-Chloroacetophenone−25862.5 ± 2.7−107.4 ± 2.44′-Chloroacetophenone−25802.7 ± 2.7−117.6 ± 2.5An empirical scheme, developed by Cox, was used to estimate the gas-phase enthalpies of formation and the obtained values were compared with the experimental ones.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 42, Issue 12, December 2010, Pages 1473-1477
نویسندگان
, ,