Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (09): 867-870.doi: 10.3866/PKU.WHXB20030918

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Thermodynamic Functions of Transfer of Naphthalene from Water to Water-t-butyl Alcohol Solutions

Zhou Bao-Xue;Cai Wei-Min;Zou Li-Zhuang   

  1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240; Harbin Institute of Technology, Harbin 150001; School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083
  • Received:2003-01-27 Revised:2003-04-07 Published:2003-09-15
  • Contact: Cai Wei-Min E-mail:wmcai@mail.sjtu.edu.cn

Abstract: Standard thermodynamic functions of transfer of naphthalene from water to H2O-t-butyl alcohol (TBA) mixtures were determined from the solubility measurements at different temperatures. Standard free energies of transfer for naphthalene showed a complex decreasing tendency with the increasing of x(TBA), and the standard entropy and enthalpy of transfer exhibited a variation of double peak curves with x(TBA).This illustrated that the micro structures of series mixed solvents of H2O-TBA underwent a complicated process from relative order to relative disorder and then from relative disorder to relative order, and back to relative disorder again, then up to relative order. The results suggested that there was a relatively ordered structure near x(TBA)= 0.08 in H2O-TBA solutions besides the existence of a clathrate structure in the water-rich region.

Key words: Naphthalene, t-butyl alcohol, Thermodynamic functions of transfer,  Intermolecular interactions