SCI和EI收录∣中国化工学会会刊

›› 2009, Vol. 17 ›› Issue (5): 796-804.

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Volumetric and Viscometric Studies of 4-Aminobutyric Acid in Aqueous Solutions of Salbutamol Sulphate at 308.15,313.15 and 318.15K

K. Rajagopal1, S. S. Jayabalakrishnan2   

  1. 1. Department of Physics, Government College of Engg, Tirunelveli-627007 Tamil Nadu, India;
    2. Department of Physics, P. S. R. Engg. College, Sivakasi, Tamil Nadu, India
  • 收稿日期:2008-11-27 修回日期:2009-02-18 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: S. S. Jayabalakrishnan,E-mail:krishnanpsr@yahoo.com

Volumetric and Viscometric Studies of 4-Aminobutyric Acid in Aqueous Solutions of Salbutamol Sulphate at 308.15,313.15 and 318.15K

K. Rajagopal1, S. S. Jayabalakrishnan2   

  1. 1. Department of Physics, Government College of Engg, Tirunelveli-627007 Tamil Nadu, India;
    2. Department of Physics, P. S. R. Engg. College, Sivakasi, Tamil Nadu, India
  • Received:2008-11-27 Revised:2009-02-18 Online:2009-10-28 Published:2009-10-28

摘要: Density (ρ) and viscosity (η) measurements were carried out for 4-aminobutyric acid in 0.0041,0.0125 and 0.0207 mol·L-1 aqueous salbutamol sulphate at T=308.15,313.15 and 318.15K.The measured values of density and viscosity were used to estimate some important parameters such as apparent molar volume Vφ,limiting apparent molar volume Vφ0 transfer volume △Vφ0,hydration number nH,second derivative of infinite dilution of partial molar volume with temperature ∂2Vφ0/∂T2,viscosity B-coefficients,variation of B with temperature dB/dT,free energy of activation per mole of solvent △μ10* and solute △μ20*,activation entropy △S20* and activation enthalpy △H20* of the amino acids.These parameters have been interpreted in terms of solute-solute and solute-solvent interactions and structure making/breaking ability of solutes in the given solution.

关键词: density, standard partial molar volume, hydration number, relative viscosity, B-coefficient, activation parameters

Abstract: Density (ρ) and viscosity (η) measurements were carried out for 4-aminobutyric acid in 0.0041,0.0125 and 0.0207 mol·L-1 aqueous salbutamol sulphate at T=308.15,313.15 and 318.15K.The measured values of density and viscosity were used to estimate some important parameters such as apparent molar volume Vφ,limiting apparent molar volume Vφ0 transfer volume △Vφ0,hydration number nH,second derivative of infinite dilution of partial molar volume with temperature ?2Vφ0/?T2,viscosity B-coefficients,variation of B with temperature dB/dT,free energy of activation per mole of solvent △μ10* and solute △μ20*,activation entropy △S20* and activation enthalpy △H20* of the amino acids.These parameters have been interpreted in terms of solute-solute and solute-solvent interactions and structure making/breaking ability of solutes in the given solution.

Key words: density, standard partial molar volume, hydration number, relative viscosity, B-coefficient, activation parameters