| Heat Capacities and Thermodynamic Properties of 3-（2,2-Dichloroethenyl）-2,2-dimethylcyclopropanecarboxylic Acid |
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| 引用本文： | XUE Bin WANG Jian-ya TAN Zhi-cheng WU Tong-hao. Heat Capacities and Thermodynamic Properties of 3-（2,2-Dichloroethenyl）-2,2-dimethylcyclopropanecarboxylic Acid[J]. 高等学校化学研究, 2007, 23(4): 460-464. DOI: 10.1016/S1005-9040(07)60099-3 |
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| 作者姓名： | XUE Bin WANG Jian-ya TAN Zhi-cheng WU Tong-hao |
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| 作者单位： | XUE Bin1，2，WANG Jian-ya1，TAN Zhi-cheng3 and WU Tong-hao21.School of Petrochemical Engineering，Shenyang University of Technology，Liaoyang 111003，P.R.China;2.College of Chemistry，Jilin University，Changchun 130021，P.R.China;3.Thermochemistry Laboratory，Dalian Institute of Chemical Physics，Chinese Academy of Science，Dalian 116023，P.R.China |
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| 基金项目： | Supported by the Education Bureau Science Foundation of Liaoning Province, China（ No. 20040261 ）. |
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| 摘 要： | The heat capacities of 3 - (2,2-dichloroethenyl) -2,2-dimethylcyclopropanecarboxylic acid ( a racemic mixture,molar ratio of cis-/trans-structure is 35/65) in a temperature range from 78 to 389 K were measured with a precise automatic adiabatic calorimeter. The sample was prepared with a purity of 98.75% ( molar fraction). A solid-liquid fusion phase transition was observed in the experimental temperature range. The melting point, Tm, enthalpy and entropy of fusion, △fusHm, △fusSm, of the acid were determined to be ( 331.48 ± 0.03 ) K, ( 16. 321 ± 0.031 ) kJ/mol,and (49.24 ± 0.19) J/( K·mol), respectively. The thermodynamic functions of the sample, HT - H298.15, ST -S298.15 and GT - G298.15, were reported at a temperature intervals of 5 K. The thermal decomposition of the sample was studied using thermogravimetric (TG) analytic technique, the thermal decomposition starts at ca. 418 K and ends at ca. 544 K, the maximum decomposition rate was obtained at 510 K. The order of reaction, preexponential factor and activation energy are n =0.23, A =7. 3 × 107 min -1, E =70.64 KJ/mol, respectively.
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| 关 键 词： | 热容量 热力学性能 热分解 热量测定 杀虫剂 |
| 收稿时间： | 2006-11-17 |
Heat Capacities and Thermodynamic Properties of 3-(2,2-Dichloroethenyl ) -2,2-dimethylcyclopropanecarboxylic Acid |
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| XUE Bin,WANG Jian-ya,TAN Zhi-cheng,WU Tong-hao. Heat Capacities and Thermodynamic Properties of 3-(2,2-Dichloroethenyl ) -2,2-dimethylcyclopropanecarboxylic Acid[J]. Chemical Research in Chinese University, 2007, 23(4): 460-464. DOI: 10.1016/S1005-9040(07)60099-3 |
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| Authors: | XUE Bin WANG Jian-ya TAN Zhi-cheng WU Tong-hao |
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| Affiliation: | 1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, P. R. China;2. College of Chemistry, Jilin University, Changchun 130021, P. R. China;3. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China |
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| Abstract: | |
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| Keywords: | 3-( 2,2 -Dichloroethenyl ) -2,2 -dimethylcyclopropanecarboxylic acid Adiabatic calorimetry Heat capacity Thermodynamic function Thermal decomposition |
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