物理化学学报 >> 1985, Vol. 1 >> Issue (06): 543-546.doi: 10.3866/PKU.WHXB19850607

研究论文 上一篇    下一篇

升华热量热计的建立和有机氯化物的蒸发热和升华热的测定

阎海科; 顾建国; 胡日恒   

  1. 中国科学院化学研究所热力学与热化学实验室
  • 收稿日期:1985-04-03 修回日期:1985-06-29 发布日期:1985-12-15

SUBLIMATION CALORIMETER AND THE MEASUREMENT OF ENTHALPIES OF VAPORIZATION AND SUBLIMATION OF TRICHLOROBENZENES

Yan Haike; Gu Jiangou; Hu Rihen   

  1. Chemical Thermodynamic and Thermochemical Laboratory Institute of Chemistry, Academia Sinica, Beijing
  • Received:1985-04-03 Revised:1985-06-29 Published:1985-12-15

摘要: 本文参照Wads设计的蒸发热量热计建立一升华热量热计。利用此升华热量热计和LKB8700蒸发热量热计, 测得如下化合物在298.15 K 时的蒸发焓和升华焓为:
化合物 升华焓(kJ mol~(-1)) 蒸发焓(kJmol~(-1))
水 43.72±0.18
正癸烷 51.21±0.25
萘 73.26±0.92
1,2,3-三氯苯 75.14±0.75
1,2,4-三氯苯 55.06±0.50
1,3,5-三氯苯 72.68±0.50

Abstract: A sublimation calorimeter has been constructed in our laboratory for solid compounds in pressure range≥0.1 mmHg at 298.15 K. Using this calorimeter and LKB 8700 vaporization calorimeter, the enthalpies of vaporization, ΔH, or the enthalpies of sublimation, ΔH_(sub), of trichorohenzens were measured to be;
Compound ΔH(kJmol)~(-1) ΔH_(sub)(kJmol~(-1))
Water 43.72±0.18
n-Decane 51.21±0.25
Naphthalene 73.26±0.92
1,2,3-Trichlorobenzene 75.14±0.75
1,2,4-Trichlorobenzene 55.06±0.50
1,3,5-Trichlorobenzene 72.68±0.50