马尿酸及乙酰苯胺燃烧能的测定

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (2): 329.

马尿酸及乙酰苯胺燃烧能的测定

安绪武¹, 何利林¹, 吴善祥², 胡荣祖²

1. 中国科学院化学研究所, 北京 100080;
2. 西安近代化学研究所, 西安 760065

收稿日期:2001-04-04 出版日期:2003-02-24 发布日期:2003-02-24
通讯作者: 安绪武(1939年出生),男,研究员,从事化学热力学和热化学研究.
基金资助:
国家自然科学基金(批准号:29773053)资助

Combustion Energies of Hippuric Acid and Acetanilide

AN Xu-Wu¹, HE Li-Lin¹, WU Shan-Xiang², HU Rong-Zu²

1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
2. Xi′an Modern Chemstry Reasearch Institute, Xi′an 760065, China

Received:2001-04-04 Online:2003-02-24 Published:2003-02-24

摘要/Abstract

摘要： 设计并建立一台精密转动弹热量计,能在恒温和绝热两种模式下操作.测量数据的采集由在线微机自动完成,测量结果通过适当的程序计算.用量热标准物质NBS39i苯甲酸标定其能当量,偏差约为±0.006%.马尿酸及乙酰苯胺的燃烧能测定值分别为-(23542.7±0.9)J/g和-(31245.8±2.4)J/g(平均值和标准偏差).不确定度为总标准偏差的2倍,分别为±4.5J/g和±7.5J/g.结果与推荐值一致.还讨论了这两个化合物作为低含氮量量热参考物质的性质.

关键词: 燃烧能, 马尿酸, 乙酰苯胺, 参考物质, 转动弹热量计

Abstract: A new precision rotating-bomb calorimeter has been built. It can be operated in the isoperibol or in the adiabatic mode. The data of the measured temperature could be collected automatically by a microcomputer and the result of determination could be calculated by using appropriate software. In the isoperibol mode, the apparatus was calibrated by using NBS39i benzoic acid with a standard deviation of the mean of ±0.006%. The combustion energies of hippuric acid and acetanilide have been determined to be -(23 542.7±0.9) J/g and-(31 245.8±2.4) J/g(mean and its standard deviation) respectively. The uncertainties of these results were estimated as twice the overall standard deviation of mean, to be ±4.5 J/g and ±7.5 J/g, respectively. These results are in agreement with the recommended values. The properties of the two compounds as the reference materials for combustion calorimetry concerning compounds containing C, H, O and N with a low nitrogen content have been discussed.

Key words: Energy of combustion, Hippuric acid, Acetanilide, Reference material, Rotating-bomb calorimeter

中图分类号:

O643.2⁺1

TrendMD:

安绪武, 何利林, 吴善祥, 胡荣祖. 马尿酸及乙酰苯胺燃烧能的测定. 高等学校化学学报, 2003, 24(2): 329.

AN Xu-Wu, HE Li-Lin, WU Shan-Xiang, HU Rong-Zu . Combustion Energies of Hippuric Acid and Acetanilide. Chem. J. Chinese Universities, 2003, 24(2): 329.