Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (11): 1040-1043.doi: 10.3866/PKU.WHXB19971116

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Solid-Liquid Phase Equilibria and Excess Gibbs Free Energies of Binary Mixtures of 1-Hexanol+o-,m-,p-Xylene

Yang Yang-Yi,Zheng Kang-Cheng,Che Guan-Quan   

  1. School of Chemistry Chemical Engineering,Zhoushan University,Guangzhou 510275
  • Received:1996-12-09 Revised:1997-06-06 Published:1997-11-15
  • Contact: Che Guan-Quan

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Abstract:

Melting temperatures have been measured and the solid-liquid phase diagrams constructed for 1-hexanol＋o-xylene, 1-hexanol＋m-xylene and 1-hexanol＋p-xylene. They are simple eutectic systems. Excess mole Gibbs free energies were calculated at 298.15K, showing larger positive deviations from ideal-solution behavior. The largest values of GmE are 711、 650 and 800 J•mol-1 for {o-C6H4(CH3)2＋C6H13OH}、 {m-C6H4(CH3)2 ＋ C6H13OH} and {p-C6H4(CH3)2＋C6H13OH} respectively.

Key words: Solid-liquid phase equilibria, Excess Gibbs free energy, Xylene, 1-Hexanol