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THERMO ACOUSTICAL PROPERTIES OF 1,1 BIS(2,6 DICHLORO 4 HYDROXYPHENYL) CYCLOHEXANE SOLUTIONS AT ATMOSPHERIC PRESSURE

Chirag B. Patel, Parsotam H. Parsania


In present work we have reported thermo acoustical and thermodynamic properties of 1,1 bis(2,6 dichloro 4 hydroxyphenyl) cyclohexane (ClBC). The density, viscosity and ultrasonic speed (U) of pure solvents 1, 4 dioxane (DO), chloroform (CF), ethyl acetate (EA), tetrahydrofuran (THF) and ClBC solutions were investigated at four different temperatures 298, 303, 308 and 313K to understand the effect of solvents and temperature on molecular interactions. Various acoustical and thermodynamic parameters such as specific acoustical impedance (Z), adiabatic compressibility (Кa), intermolecular free path length (Lf), Raos molar sound function (Rm), Van der Waals constant (b), internal pressure, free volume (Vf), viscous relaxation time and classical absorption coefficient were calculated and fairly good corelationship between calculated parameters were obtained. A fairly good to excellent correlation between a given parameter and concentration is observed at all temperatures and solvent systems studied. Gibbs free energy of activation is found both concentration and temperature dependent. Both enthalpy of activation and entropy of activation are found concentration dependent. Thus, acoustical and thermodynamic parameters confirmed presence of strong molecular interactions and structure making nature of the compound.