物理化学学报 >> 1985, Vol. 1 >> Issue (01): 76-81.doi: 10.3866/PKU.WHXB19850110

研究论文 上一篇    下一篇

卟啉化合物的热化学研究
Ⅰ. 精密燃烧量热装置及标定

薛荣书; 吴鼎泉; 屈松生   

  1. 武汉大学化学系
  • 收稿日期:1984-07-16 修回日期:1984-10-15 发布日期:1985-02-15

STUDIES ON THERMOCHEMISTRY OF PORPHYRINS
Ⅰ. A Precision Combustion Calorimetric Apparatus and Calibration

Xue Rongshu; Wu Dingquan; Qu Songsheng   

  1. Department of Chemistry; Wuhan University
  • Received:1984-07-16 Revised:1984-10-15 Published:1985-02-15

PDF

1888

赞

摘要： 本文报道了一套用热敏电阻作测温元件的精密静弹燃烧量热装置。数据处理用电子计算机按自编程序完成。用中国计量科学院提供的量热基准苯甲酸标定了量热计的能当量, 其精密度(2s.d.m计)为0.01％。利用此仪器测得三羟甲基氨基甲烷的燃烧能为△_cu°(298.15 K)=-20030.3±6.0 Jg~(-1), 与文献值吻合, 证实了本装置的可靠性。

Abstract: A precision static oxygen bomb combustion calorimeter with thermistor thermometer was constructed in this laboratory. The experimental data was treated with electronic computer, the programme was designed by ourselves. The calorimeter was calibrated with benzoic acid of purity 99.999 percent, its energy equivalent is 12.6028±0.00114 kJk~(-1). Using this calorimeter, the standard energy of combustion of tris (hydroxy-methyl)-aminomethane (THAM) at 298.15 K was measured, its value was Δ_cu~°=-20.0303±0.0060 kJg~, in satisfactory agreement with that cited in literature (-20.0303±0.0034 kJg~(-1)), the reliability of this apparatus wa confided.