摘要
本文用LKB 2277 Bioactivity Monitor微量流动热量计测定卤代乙酸、脂肪酸在水-乙醇混合溶剂中的标准电离焓,计算了热力学函数,结合文献数据,计算各酸根离子从水迁移到混合溶剂的迁移自由能.并讨论溶剂效应对弱酸电离的影响.
The ionization enthalpies of acetic, chloroacetic, bromoacetic, iodoacetic, propionic and n-butyric acids in water-EtOH mixtures were measured at 298.15K with an LKB 2277 Bioactivity monitor. The values of free energy and entropy of ionization were then calculated. On the base of experimental data, the free energy changes on transfer of carboxylate ions from water to water-EtOH mixtures for the studied acids were obtained according to the procedure given in the literatures. The solvent effects on the ionization of the six weak acids were discussed in detail.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1995年第2期120-124,共5页
Acta Chimica Sinica
基金
国家自然科学基金资助的项目
