Topological and thermodynamic investigations of molecular interactions in binary mixtures: Molar excess volumes and molar excess enthalpies

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• 作者：Sanjeev Maken ; Bal Raj Deshwal ; Renu Chadha ; Anu ; Krishan Chander Singh ; Hwayong Kim and Jin-Won Park
• 关键词：Molar excess volume ; Molar excess enthalpy ; Butyl acetate ; Aromatics ; Graph theoretical approach
• 刊名：Fluid Phase Equilibria
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：235
• 期：1
• 页码：42-49
• 全文大小：271 K

文摘

Molar excess volumes and molar excess enthalpies of butyl acetate (i) with cyclohexane or benzene or toluene or o-, m- or p-xylene (j) binary mixtures have been measured dilatometrically and calorimetrically over the entire composition range at 308.15 K. The observed data have also been analyzed in terms of graph theoretical approach. The analysis of V^E data by graph theoretical approach suggests that butyl acetate in pure state exists as associated entity and (i + j) mixtures are characterized by the presence of (i–j) molecular entity. It has further been observed that V^E and H^E values calculated by this approach agree well with the corresponding experimental values. The presence of molecular entity is further confirmed by IR study of (i + j) mixture.