高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (2): 349.doi: 10.7503/cjcu20150594

• 物理化学 • 上一篇    下一篇

四硼酸锂水溶液体系的热容及离子相互作用

李珑, 张思思, 刘元会, 郭亚飞, 邓天龙()   

  1. 天津市海洋资源与化学重点实验室, 天津科技大学化工与材料学院, 天津 300457
  • 收稿日期:2015-07-29 出版日期:2016-02-10 发布日期:2016-01-14
  • 作者简介:联系人简介: 邓天龙, 男, 博士, 教授, 主要从事溶液化学研究. E-mail:tldeng@tust.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21306136, U1407113)、 教育部科研创新团队培育计划项目(批准号: [2013]373)和天津市科研创新团队项目(批准号: TD12-5004)资助

Heat Capacities and Ion-interaction of Lithium Tetraborate Aqueous Solution System

LI Long, ZHANG Sisi, LIU Yuanhui, GUO Yafei, DENG Tianlong*()   

  1. Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Material Sciences,Tianjin University of Science and Technology, Tianjin 300457, China
  • Received:2015-07-29 Online:2016-02-10 Published:2016-01-14
  • Contact: DENG Tianlong E-mail:tldeng@tust.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21306136, U1407113), the Training Program for Yangtze Scholars and Innovative Research Team in University, China(No.[2013]373) and the Innovative Research Team of Tianjin Municipal Education Commission, China(No.TD12-5004)

摘要:

采用Setaram BT 2.15微量热仪测定了Li2B4O7-H2O体系(Li2B4O7的浓度为0.00415~0.4208 mol/kg)在298.15, 308.15和323.15 K下的热容, 分别计算了不同温度和浓度下的表观摩尔热容, 并获得了不同温度下表观摩尔热容与浓度的关系式. 基于Li2B4O7-H2O体系的热容测定结果, 应用Pitzer电解质溶液离子相互作用表观摩尔热容模型, 拟合获得了四硼酸锂在不同温度下的Pitzer单盐参数.

关键词: 四硼酸锂, 热容, 量热法, 电解质溶液, Pitzer单盐参数

Abstract:

The heat capacities of aqueous solution systems(Li2B4O7-H2O) with molality of Li2B4O7 of 0.00415—0.4208 mol/kg at 298.15, 308.15 and 323.15 K were determined experimentally using microcalorimeter. On the basis of experimental data, the apparent molar heat capacities at different concentrations and temperatures were calculated, and the relationship equations between apparent molar heat capacity and solution concentration of lithium tetraborate at 298.15, 308.15 and 323.15 K were obtained. The Pitzer single salt parameters of lithium tetraborate at different temperatures were fitted based on the Pitzer ion-interaction theory on the apparent molar heat capacity of electrolytes.

Key words: Lithium tetraborate, Heat capacity, Calorimetric method, Electrolyte solution, Pitzer single salt parameter

中图分类号: 

TrendMD: