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Ultrasonic studies of mixtures of ethyl formate and n-alcohols in carbon tetrachloride

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Abstract

Density (ρ), viscosity (η) and ultrasonic velocity (U) have been measured for the ternary mixtures of ethyl formate with 1-butanol, 1-pentanol and 1-hexanol in carbon tetrachloride at 303 K. From the experimental data, several acoustic parameters such as adiabatic compressibility (β), acoustic impedance(Z), viscous relaxation time(τ), free length (L f ), free volume (V f ), internal pressure (π i ) and Gibb’s free energy (ΔG) have been determined. The excess values of the above parameters (β E , Z E , τ E , L E f , V E f , π E i and ΔG E) were also determined and interpreted in terms of molecular association such as hydrogen bonding formed between the liquid mixtures. The results show that hetero-association and homo-association of molecules decrease with the increase in chain length of carbon atoms in alcohols. It is observed that the molecular interaction of alcohols with ethyl formate is in the order of 1-butanol < 1-pentanol < 1-hexanol.

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Acknowledgments

The authors thank the Principal, Easwari Engineering College, Chennai, Tamil Nadu, India for providing the necessary facilities in the physics laboratory.

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Authors and Affiliations

  1. Department of Physics, Easwari Engineering College, Chennai, 600 089, Tamil Nadu, India

    S Elangovan

  2. Research and Development Centre, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India

    S Mullainathan

  3. Department of Physics, A.V.C. College of Engineering, Mayiladuthurai, 609 305, Tamil Nadu, India

    S Mullainathan

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  1. S Elangovan
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  2. S Mullainathan
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Correspondence to S Elangovan.

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Elangovan, S., Mullainathan, S. Ultrasonic studies of mixtures of ethyl formate and n-alcohols in carbon tetrachloride. Indian J Phys 87, 373–378 (2013). https://doi.org/10.1007/s12648-012-0230-z

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  • DOI: https://doi.org/10.1007/s12648-012-0230-z

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