Heat capacities and thermodynamic properties of chrysanthemic acid |
| |
| Authors: | Xue B Wang J-Y Tan Z-C Lu S-W Meng S-H |
| |
| Institution: | (1) School of Petrochemical Engineering, Shenyang University of Technology, Box 33, Guanghua Street number 30, Liaoyang, 111003, P.R. China;(2) Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, P.O. Box 110, Dalian, 116023, P.R. China |
| |
| Abstract: | The heat capacities of chrysanthemic acid in the temperature range from 80 to 400 K were measured with a precise automatic
adiabatic calorimeter. The chrysanthemic acid sample was prepared with the purity of 0.9855 mole fraction. A solid-liquid
fusion phase transition was observed in the experimental temperature range. The melting point, T
m, enthalpy and entropy of fusion, Δfus
H
m, Δfus
S
m, were determined to be 390.741±0.002 K, 14.51±0.13 kJ mol-1, 37.13±0.34 J mol-1 K-1, respectively. The thermodynamic functions of chrysanthemic acid, H
(T)-H(298.15), S
(T)-S(298.15) and G
(T)-G
(298.15) were reported with a temperature interval of 5 K. The TG analysis under the heating rate of 10 K min-1 confirmed that the thermal decomposition of the sample starts at ca. 410 K and terminates at ca. 471 K. The maximum decomposition
rate was obtained at 466 K. The purity of the sample was determined by a fractional melting method.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
| Keywords: | TG thermal decomposition heat capacity adiabatic calorimetry thermodynamic function chrysanthemic acid |
| 本文献已被 SpringerLink 等数据库收录！ |
|
