کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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675148 | 1459589 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Enthalpies of combustion and formation of 2-acetylpyrrole, 2-acetylfuran and 2-acetylthiophene Enthalpies of combustion and formation of 2-acetylpyrrole, 2-acetylfuran and 2-acetylthiophene](/preview/png/675148.png)
The combustion energies for 2-acetylpyrrole (cr) and 2-acetylfuran (cr) were determined using a static bomb calorimeter, whereas the combustion energy of 2-acetylthiophene (l) was determined with a rotating bomb calorimeter; both calorimeters have been recently described. The molar combustion energies obtained were: −(3196.1 ± 0.6) kJ mol−1 for 2-acetylpyrrole, −(2933.8 ± 0.7) kJ mol−1 for 2-acetylfuran, and −(3690.4 ± 0.8) kJ mol−1 for 2-acetylthiophene. From these combustion energy values, the standard molar enthalpies of formation in the condensate phase were obtained as: −(163.51 ± 0.97) kJ mol−1, −(283.50 ± 1.06) kJ mol−1 and −(123.93 ± 1.15) kJ mol−1, respectively. The obtained values of combustion and formation enthalpies of 2-acetylthiophene are in concordance with the reported previously. For the two last compounds, polyethene bags were used as an auxiliary material in the combustion experiments. The heat capacities and purities of the compounds were determined using a differential scanning calorimeter.
Journal: Thermochimica Acta - Volume 493, Issues 1–2, 10 September 2009, Pages 76–79