화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.25, No.2, 273-278, March, 2008
DOI10.1007/s11814-008-0048-8  Export Citation
Excess Gibbs free energy of butyl acetate with cyclohexane and aromatic hydrocarbons at 308.15K
Sanjeev Maken†, Naveen Verma1, Ankur Gaur2, Ho-Jun Song2, Krishan Chander Singh1, and Jin-Won Park2
  • Department of Applied Sciences, Deenbandhu C. R. University of Science & Technology, Murthal-131 039, India
  • 1Department of Chemistry, Maharshi Dayanand University, Rohtak-124 001, India
  • 2Department of Chemical Engineering, Yonsei University, 134, Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
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Molar excess Gibbs free energies of mixing (CE) for butyl acetate+cyclohexane or benzene or toluene or o- or m- or p-xylene were calculated by using Barker’s method from the measured vapor pressure data by static method at 308.15±0.01 K over the entire composition range. The GE values for the binary mixtures containing cyclohexane or benzene are positive; while these are negative for toluene, o-, m- and p-xylene system over the whole composition range. The GE values of an equimolar mixture for these systems vary in the order: cyclohexane>benzene>o-xylene>m-xylene>p-xylene>toluene. The GE values for these systems were also calculated by Sanchez and Lacome theory using the previously published excess enthalpy and excess volume data. It is found that while values of GE from Sanchez and Lacombe theory are in reasonably good agreement with those calculated by Barker method for m-xylene and pxylene mixtures, agreement is very poor for other systems although they predict the sign of GE data except in the case of mixtures containing benzene.
Keywords:Gibbs Free Energy;Vapor Liquid Equilibrium;Static Method;Butyl Acetate;Aromatic Hydrocarbon;Barker’s Method;Sanchez and Lacombe Theory
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