Thermo-physicochemical investigation of molecular interactions in binary combination (dimethyl carbonate + methyl benzoate): Measurements and correlation

G. Jyothirmai, S. M. Nayeem, Imran Khan, C. Anjaneyulu

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Abstract

To probe the nature of interaction and its deeds with temperature in the binary combination (dimethyl carbonate + methyl benzoate), the density (ρ)/speed of sound (u) be established for the total mole fraction array at T = (308.15, 313.15 and 318.15) K and at atmospheric pressure. Sign with magnitude of evaluated excess molar volume ((Formula presented.)) was inspected and comprehensive analysis elucidated not only pervasiveness of strong molecular interactions between molecules but also its transform with temperature. Additional, strong interactions are properly hold up by partial and excess partial molar volume ((Formula presented.), (Formula presented.), (Formula presented.)). Additionally, relative association (RA), Lennard-Jones repulsive power (n), excess isentropic compressibility ((Formula presented.)), partial and their excess partial molar isentropic compressibility ((Formula presented.), (Formula presented.)), excess values of isobaric thermal expansion coefficient ((Formula presented.)), isothermal compressibility ((Formula presented.)), intermolecular free length ((Formula presented.)), acoustic impedance (ZE), ultrasonic speed (uE) were evaluated and confirmed the deductions of (Formula presented.). By Redlich–Kister equation, standard deviations are computed through coefficients for excess parameters. At T = 308.15 K, (Formula presented.) is correlated by theories of Prigogine–Flory–Patterson (PFP)/topology/Soave–Redlich–Kwong (SRK)/Peng–Robinson (PR) cubic equation of states; prophesied first-order derivatives of thermodynamic potentials; using semi-empirical equations, excess chemical potential/activity coefficients/theoretical speeds are estimated and correlated. Further, microscopic molecular properties are assessed at all temperatures by Sehgal’s equations on nonlinear relations.

Original languageEnglish
Pages (from-to)1-15
Number of pages15
JournalJournal of Thermal Analysis and Calorimetry
DOIs
Publication statusAccepted/In press - Dec 22 2017

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Keywords

  • Activity coefficients
  • Density
  • Excess parameters
  • Nonlinear equations
  • Prigogine–Flory–Patterson theory
  • Sound speed
  • SRK/PR EoS
  • Theory of topology

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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