高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (3): 381.

• 论文 • 上一篇    下一篇

Zn(Val)SO4·H2O在丙酮-水混合溶剂中的结晶动力学

高胜利, 房艳, 胡荣祖, 陈三平, 史启祯   

  1. 陕西省物理无机化学重点实验室, 西北大学化学系, 西安 710069
  • 收稿日期:2002-05-16 出版日期:2003-03-24 发布日期:2003-03-24
  • 通讯作者: 高胜利(1946年出生),男,教授,博士生导师,从事配合物的相化学和热化学研究.E-mail:gaoshli@nwu.edu.cn E-mail:gaoshli@nwu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29871032,20171036)资助

Crystallization Kinetics of Zn(Val)SO4·H2O in Mixed Solvent of Water with Acetone

GAO Sheng-Li, FANG Yan, HU Rong-Zu, CHEN San-Ping, SHI Qi-Zhen   

  1. Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xi′an 710069, China
  • Received:2002-05-16 Online:2003-03-24 Published:2003-03-24

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摘要： 确定了Zn(Val)SO4·H2O在水-丙酮中结晶生长的最佳体积比为1:10,用微量热法测定了该结晶生长过程在298.15K时的放热量及产热速率,计算了动力学常数,认为结晶过程符合Burton-Cabrera-Frank位错理论.同时测定了Zn(Val)SO4·H2O于298.15K时在纯水中的溶解焓为(28.46±0.08)kJ·mol-1,计算了Zn(Val)2+(aq)的标准生成焓为(-569.71±3.84)kJ·mol-1.

关键词: Zn(Val)SO4·, H2O, 混合溶剂, 结晶动力学, 微量热法, 溶解焓

Abstract: The optimum volume ratio of water to acetone for Zn(Val)SO4·H2O crystalling from the mixed solvent of water with acetone has been determined, which is 1∶10. The crystal growth process of the compound at 298.15 K is investigated by microcalorimetry. The experimental results show that it obeys the Burton-Cabrera-Frank dislocation theory. Moreover, the enthalpy of solution of Zn(Val)SO4·H2O in water has been measured at 298.15 K. The standard enthalpy of formation of Zn(Val) 2+(aq) has been calculated.

Key words: Zn(Val)SO4·H2O, Mixed solvent, Crystallization kinetics, Microcalorimetry, Enthalpy of solution

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