کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216857 | 1426284 | 2010 | 6 صفحه PDF | دانلود رایگان |
The enthalpy of the 1-butyl-3-methylimidazolium iodide synthesis, its heat capacity and parameters of fusion were determined from calorimetric measurements. The standard molar enthalpy of formation for this compound in the crystal and liquid states at T = 298 K was determined from these results to be −(138 ± 6) kJ · mol−1 and −(119 ± 6) kJ · mol−1, respectively. With the use of the literature data and the results obtained in this work, a simple equation for calculation of ΔfHm∘ for 1-butyl-3-methylimidazolium compounds in the crystalline and liquid states is proposed. It was demonstrated that the additive scheme by Domalski and Hearing (1993) can be used for calculation of ΔfHm∘ in the homologous series of ionic liquid forming compounds in the liquid state. However, for the crystalline state, all the analyzed additive schemes did not provide satisfactory description of the experimental data.
Journal: The Journal of Chemical Thermodynamics - Volume 42, Issue 10, October 2010, Pages 1292–1297