Excess Molar Enthalpies of Binary Mixtures Containing Butyl Acetate (1) + 1- Alkanols (C1-C6) (2) and Their Correlations at 298.15 K

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 288

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شناسه ملی سند علمی:

ISPTC21_159

تاریخ نمایه سازی: 30 دی 1397

چکیده مقاله:

Real behavior of binary mixtures is frequently described through excess properties [1].Knowledge of molar excess enthalpies, , is fundamental in designing and developingindustrial processes and data on molar excess enthalpies of mixtures are valuable source ofthermodynamic information elucidate microscope structures of the solutions and interactionsamong the components. The determination and research of excess molar enthalpy not only aid toclarify the structure of solution, test and improve theories of solution, but also can providesignificant thermodynamic basic data for the development and design of chemical engineeringprocess. In this paper, excess molar enthalpies, H(E)(m) for the binary mixtures of butyl acetate +methanol, ethanol, 1- propanol, 1-butanol, 1-pentanol, and 1-hexanol were measured over thewhole range of composition at T = 298.15 K and ambient pressure using a Parr 1455 solutioncalorimeter. The excess partial molar enthalpies, (...) and excess partial molar enthalpies atinfinite dilution (...), were calculated according to experimental excess molar enthalpies andRedlich–Kister polynomial equation. The sign of H(E)(m) for all systems are positive and themagnitude of H(E)(m) values increases with increasing of alkyl chain length. The experimentalexcess molar enthalpy data have been also correlated using Redlich–Kister and SSF equationsand Wilson and NRTL thermodynamic models. Esters are very important dipolar solvent of thebest candidates that exist as dipolar associates in their pure liquid state, whereas alkanols are selfassociated molecule due to intermolecular hydrogen bonding. Besides it is very well known thatmixtures containing alkanols and esters are very important and hold considerable interestbecause of wide use in industrial applications [2‒4]. The experimental data have been qualitativelydiscussed and evaluated the nature and type of intermolecular interactions in studied binarymixtures.

نویسندگان

K Khanlarzadeh

Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran

H Iloukhani

Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran