物理化学学报 >> 1995, Vol. 11 >> Issue (07): 590-595.doi: 10.3866/PKU.WHXB19950705

研究论文 上一篇    下一篇

NaCl、KCl在蔗糖水溶液中的粘度

刘文彬,吴艳平,王键吉,卢锦梭   

  1. 河南师范大学化学系|新乡 453002
  • 收稿日期:1994-05-09 修回日期:1994-09-19 发布日期:1995-07-15
  • 通讯作者: 刘文彬

Viscosity of NaCl and KCl in Aqueous Sucrose Solutions

Liu Wen-Bin,Wu Yan-Ping,Wang Jian-Ji,Lu Jin-Suo   

  1. Department of Chemistry,Henan Normal University,Xinxiang 453002
  • Received:1994-05-09 Revised:1994-09-19 Published:1995-07-15
  • Contact: Liu Wen-Bin

摘要:

报导了在298.15及308.15K下,NaCl、KCl在含有蔗糖5,10,15,20,25%(质量分数w)的水溶液中的密度及粘度数据.计算了在无限稀释条件下,NaCl和KCl在该体系中的粘度B系数及偏摩尔体积.结果发现:两种电解质的B系数随蔗糖含量的增加及温度的升高而增大且对蔗糖水溶液的结构起破坏作用.讨论了该三元体系内部溶质-溶质、溶质-溶剂间的相互作用,同时应用流动过渡状态理论计算了两种电解质在各组成下蔗糖水溶液中的流动活化参数

关键词: 粘度B系数, 流动活化参数, 相互作用, 偏摩尔体积

Abstract:

Viscosities and densities at 298.15 and 308.15K are reported for NaCl and KCl in aqueous sucrose solutions. The viscosity B coefficients and partial molar volumes at infinite dilution have been calculated. The experimental results show that B coefficients increase with the increase of sucrose concentration and of temperature and that the two electrolytes are structure-breakers for the sucrose aqueous solutions. The terms of solute-solute and solute-solvent interactions in ternary water-sucrose-electrolyte systems are discussed. Also the activation parameters for viscous flow of NaCl and KCl in this system have been calculated.

Key words: Viscosity B coefficient, Activation parameter, Interaction, Partial molar volume