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  • Chem Sci Trans., 2018, 7(2),  pp 201-210  

    DOI:10.7598/cst2018.1469

    Research Article

    Evaluation of Theoretical Velocities and Comparative Study of Ultrasonic Velocities in Binary Liquid Mixtures of Ethyl Lactate with Branched Alkanols at Different Temperatures

  • K. A. K. RAJKUMAR1, G. R. SATYANARAYANA2, G. LAKSHMANA RAO1, SK. BEEBI1, P. B. SANDYA SRI3 and C. RAMBABU1*
  • 1Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh, India
    2Department of Chemistry, Sir. C.R. Reddy PG College, Eluru, Andhra Pradesh, India
    3Department of Physics, K.B.N. College, Vijayawada-, Andhra Pradesh, India
  • Abstract

    Theoretical velocities of binary liquid mixtures of ethyl lactate (EL) with 2-propanol (PNL), 2-butanol (BNL) and 2-methy,1-propanol (MPL), at different temperature (303.15, 308.15, 313.15 and 318.15 K) have been evaluated by using theoretical models of Nomoto (NOM), Impedance (IMP), Van Dael and Vangeel (VDV), Junjie?s (JUN) and Rao?s specific velocity (RAO) relations. Ultrasonic velocities and densities of these mixtures have also been measured experimentally as a function of composition of EL and temperature. The deviation in experimental values and calculated values from different theories confirms the existence of molecular interactions between molecules of the constituent liquids. U2exp/U2imx has also been evaluated for non-ideality in the mixtures. Chi-square test for the goodness of the fit is applied to investigate the relative applicability of these theories to the present systems. The results are subjected to discussion in terms of intermolecular interactions between the component molecules in the chosen binary liquid mixtures.

    Keywords

    Theoretical velocities, Ultrasonic velocities, Chi-square test, Molecular interaction parameter

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