Thermoacoustic Properties of 1-Propanol-n-Hexane and 1-Propanol-Cyclohexane Binary Mixtures: A Comparative Study at 298.15 K

Year : 2026 | Volume : 17 | Issue : 01 | Page : 19 30
    By

    Wakulkar A. P.,

  • Lanjewar M. R.,

  • Shah S. A.,

  • Bhukya P. P.,

  1. Assistant Professor, Department. of Chemistry, Anand Niketan College Warora, Maharashtra, India
  2. Professor, P.G.T. Department. of Chemistry, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
  3. Professor, P.G.T. Department. of Chemistry, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
  4. Assistant Professor, Department. of Chemistry, Anand Niketan College Warora, Maharashtra, India

Abstract

This study reports the measurement of ultrasonic velocity (U), viscosity (η), and density (ρ) for the binary liquid mixtures 1-propanol–n-hexane and 1-propanol–cyclohexane at 298.15 K over the full composition range (mole fraction 0.1–0.9). From the experimentally measured data, several important thermodynamic and acoustic parameters, including isentropic compressibility (βₐ), acoustic impedance, intermolecular free length, free volume (Vf), and internal pressure (πᵢ), were systematically derived to assess the magnitude and nature of intermolecular interactions operating within the mixtures. Density, viscosity, and ultrasonic velocity measurements were carried out with high precision using an Anton Paar DSA 5000 M instrument, ensuring reliable and reproducible results across the entire composition range. Comparative analysis revealed that the 1-propanol–cyclohexane system consistently exhibited higher values of ultrasonic velocity, viscosity, acoustic impedance, internal pressure, relaxation behavior, and classical absorption, together with lower isentropic compressibility and intermolecular free length, when compared to the corresponding 1-propanol–n-hexane system. These trends clearly indicate enhanced molecular association, reduced free volume, and more efficient molecular packing in mixtures containing cyclohexane. The observed behavior is primarily attributed to the compact, cyclic geometry of cyclohexane, which promotes closer molecular approach and stronger dispersive and associative interactions, in contrast to the relatively flexible linear structure of n-hexane. The systematic variation of the evaluated parameters with composition further supports the existence of significant structural rearrangements at the microscopic level. Collectively, the results demonstrate the high sensitivity of ultrasonic and derived acoustic parameters in elucidating microstructural organization and provide a robust and effective framework for probing solute–solvent interactions in mixed liquid systems.

Keywords: Acoustic impedance, binary liquid mixtures, intermolecular non-covalent interactions, isentropic compressibility, ultrasonic velocity

[This article belongs to Journal of Modern Chemistry & Chemical Technology ]

How to cite this article:
Wakulkar A. P., Lanjewar M. R., Shah S. A., Bhukya P. P.. Thermoacoustic Properties of 1-Propanol-n-Hexane and 1-Propanol-Cyclohexane Binary Mixtures: A Comparative Study at 298.15 K. Journal of Modern Chemistry & Chemical Technology. 2026; 17(01):19-30.
How to cite this URL:
Wakulkar A. P., Lanjewar M. R., Shah S. A., Bhukya P. P.. Thermoacoustic Properties of 1-Propanol-n-Hexane and 1-Propanol-Cyclohexane Binary Mixtures: A Comparative Study at 298.15 K. Journal of Modern Chemistry & Chemical Technology. 2026; 17(01):19-30. Available from: https://journals.stmjournals.com/jomcct/article=2026/view=241384


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Regular Issue Subscription Original Research
Volume 17
Issue 01
Received 21/01/2026
Accepted 23/01/2026
Published 27/02/2026
Publication Time 37 Days
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