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Excess thermodynamic properties of mixtures of alkyl benzoates withn-heptane

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Abstract

The paper reportsh E values at 298.15 K andv E and δη values at various temperatures for binary mixtures of propyl or butyl benzoate andn-heptane. The excess Gibbs energy of viscous flow,Δg *E, and the thermodynamic activation properties were calculated from these values. The results are compared with those for similar mixtures and interpreted on the basis of the characteristic dipole-dipole interactions of alkyl esters.

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Abbreviations

A i :

Parameters in Eq. (2)

dg *E :

Gibbs free energy of viscous flow (J · mol−l)

dg ≠ :

Activation free energy (kJ · mol−1)

K :

Parameter in Eq. (2)

h :

Planck constant

h E :

Excess enthalpy (J · mol−1)

Δh≠ :

Activation enthalpy (kJ · mol−1)

N :

Avogadro number

R :

Universal gas constant (J · K−1 · mol−1)

s :

Standard deviation

Δs≠ :

Activation entropy (J · K−1 · mol−1)

T :

Temperature (K)

v :

Molar volume of pure component (m3 · mol−1)

v E :

Excess volume (m3 · mol−1)

x i :

Mole fraction of componenti

α :

Expansion coefficient (K−1)

ρ :

Density (kg · m−1 )

η :

Viscosity (mPa · s )

δη :

Apparent excess viscosity (mPa · s)

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Authors and Affiliations

  1. Laboratorio de Termodinámica y Fisicoquimica, Escuela Superior de Ingenieros Industriales, Universidad de Las Palmas de Gran Canaria, 35071, Las Palmas de Gran Canaria, Spain

    A. M. Blanco & J. Ortega

Authors
  1. A. M. Blanco
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  2. J. Ortega
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Blanco, A.M., Ortega, J. Excess thermodynamic properties of mixtures of alkyl benzoates withn-heptane. Int J Thermophys 15, 699–710 (1994). https://doi.org/10.1007/BF01563794

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  • DOI: https://doi.org/10.1007/BF01563794

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