| 苯氧威 (C17H19NO4) 的热容和热力学性质 |
| |
| 引用本文： | 孙晓红,刘源,谭志诚,贾婴琦,杨建武,王美涵.苯氧威 (C17H19NO4) 的热容和热力学性质[J].中国化学,2005,23(5):501-505. |
| |
| 作者姓名： | 孙晓红 刘源 谭志诚 贾婴琦 杨建武 王美涵 |
| |
| 作者单位： | 西北大学化工学院, 化学研究所, 西安 710069;西北大学化学系, 西安 710069;中国科学院大连化学物理研究所热化学实验室, 大连 116023 |
| |
| 摘 要： | 通过小样品精密自动绝热量热计测定了自己合成并提纯的苯氧威 (C17H19NO4) 在79 ～ 360 K温区的低温摩尔热容。量热实验发现, 该化合物在320 ~ 330 K温区, 有一固 - 液熔化相变过程, 其熔化温度为（326.31±0.14）K, 摩尔熔化焓、摩尔熔化熵及化合物的纯度分别为：(26.98±0.04) kJ• mol-1和（82.69 0.09）J•mol-1•K-1和 (99.53±0.01 )%。并计算出了80-360 K的热力学参数。用分步熔化法得到绝对纯化和物的熔点为326.60±0.06 K。用差示扫描量热 (DSC) 技术对该物质的固-液熔化过程作了进一步研究，结果与绝热量热法一致。
|
| 关 键 词： | 热容量 热力学性质 热量测定方法 C17H19NO4 激素活性 乙烷基2-（p-苯氧基）乙烷基碳酰胆碱 杀虫剂 棉花 蚜虫 |
| 收稿时间： | 2004-7-9 |
| 修稿时间： | 2005-1-4 |
Heat Capacity and Enthalpy of Fusion of Fenoxycarb |
| |
| Sun Xiao-Hong,Liu Yuan-Fa,Tan Zhi-Cheng,Jia Ying-Qi,Yang Jian-Wu,Wang Mei-Han.Heat Capacity and Enthalpy of Fusion of Fenoxycarb[J].Chinese Journal of Chemistry,2005,23(5):501-505. |
| |
| Authors: | Sun Xiao-Hong Liu Yuan-Fa Tan Zhi-Cheng Jia Ying-Qi Yang Jian-Wu Wang Mei-Han |
| |
| Institution: | 1. Project supported by the National Natural Science Foundation of China (No. 20373072) and the Natural Science Foundation of Shaanxi Province (No. 2001H11).;2. Department of Chemistry, Northwest University, Xi'an, Shaanxi 710069, China;3. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China;4. College of Chemical Engineering, Chemical Research Institute, Northwest University, Xi'an, Shaanxi 710069, China |
| |
| Abstract: | Fenoxycarb was synthesized and its heat capacities were precisely measured with an automated adiabatic calorimeter over the temperature range from 79 to 360 K. The sample was observed to melt at (326.31±0.14) K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be (26.98±0.04) kJ·mol‐1, (82.69±0.09) J·K‐1·mol‐1 and 99.53%±0.01%, respectively. The thermodynamic functions relative to the reference temperature (298.15 K) were calculated based on the heat capacity measurements in the temperature range between 80 and 360 K. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments was (326.62±0.06) K. Further research on the melting process of this compound was carried out by means of differential scanning calorimetry technique. The result was in agreement with that obtained from the measurements of heat capacities. |
| |
| Keywords: | fenoxycarb heat capacity thermodynamic functions adiabatic calorimetry differential scanning calorimetry |
|
| 点击此处可从《中国化学》浏览原始摘要信息 |
| 点击此处可从《中国化学》下载免费的PDF全文 |
|
