کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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217274 | 1426311 | 2008 | 4 صفحه PDF | دانلود رایگان |
The experimental determinations of combustion energies and the standard molar enthalpies of formation of 2-mercaptobenzimidazole, 2-mercaptobenzothiazole, and 2-mercaptobenzoxazole are presented. The combustion energies of compounds were determined by using a rotating-bomb calorimeter. The calorimeter used in the present work has been assembled, calibrated, and tested recently in our laboratory with desired results. As combustion auxiliary material, polyethene was used and its combustion energy was determined by using a static-bomb calorimeter. The combustion energies of 2-SH-benzazoles were used to derive the correspondent formation enthalpies in condensate phase at T = 298.15 K. The values of ΔfHm∘ for the compounds are (48.6 ± 1.4) kJ · mol−1, (85.3 ± 1.5) kJ · mol−1, and (−112.7 ± 1.4) kJ · mol−1, respectively.
Journal: The Journal of Chemical Thermodynamics - Volume 40, Issue 7, July 2008, Pages 1106–1109