Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9694129 | Thermochimica Acta | 2005 | 6 Pages |
Abstract
The low temperature heat capacities of N-(2-cyanoethyl)aniline were measured with an automated adiabatic calorimeter over the temperature range from 83 to 353 K. The temperature corresponding to the maximum value of the apparent heat capacity in the fusion interval, molar enthalpy and entropy of fusion of this compound were determined to be 323.33 ± 0.13 K, 19.4 ± 0.1 kJ molâ1 and 60.1 ± 0.1 J Kâ1 molâ1, respectively. Using the fractional melting technique, the purity of the sample was determined to be 99.0 mol% and the melting temperature for the tested sample and the absolutely pure compound were determined to be 323.50 and 323.99 K, respectively. A solid-to-solid phase transition occurred at 310.63 ± 0.15 K. The molar enthalpy and molar entropy of the transition were determined to be 980 ± 5 J molâ1 and 3.16 ± 0.02 J Kâ1 molâ1, respectively. The thermodynamic functions of the compound [HT â H298.15] and [ST â S298.15] were calculated based on the heat capacity measurements in the temperature range of 83-353 K with an interval of 5 K.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Qi-Feng Tian, Zhi-Cheng Tan, Quan Shi, Fen Xu, Li-Xian Sun, Tao Zhang,