Acta Chimica Sinica ›› 1991, Vol. 49 ›› Issue (12): 1445-1449.     Next Articles

Original Articles

乙酸、卤代乙酸在水溶液中电离焓的测量和热力学过程的研究

胡瑞定;林瑞森;俞庆森   

  1. 浙江大学化学系.杭州(310027)
  • 发布日期:1991-12-15

The measurement of ionization enthalpies of acetic acid, halogenoacetic acids and study on their thermodynamic process

Hu Ruiding;Lin Ruisen;Yu Qingsen   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027)
  • Published:1991-12-15

The ionization enthalpies of acetic acid, chloro-, bromo- and iodo- acetic acids were measured at 5℃ intervals between 20℃ and 45℃ in aqueous solution by LKB-2277 Bioactivity Monitor. The experimental results indicated that the order of ionization enthalpies is: acetic acid>chloroacetic acid>bromoacetic acid>iodoacetic acid. There is linear relationship between the ionization enthalpies and temperature at the range of the experimental temperature. The effects caused by substituent group and temperature were explained by interaction between solute and solvent and by "Internal-environmental" model.

Key words: ACETIC ACID, THERMODYNAMIC PROCESS, MEASUREMENTS, AQUEOUS SOLUTION

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