Journal of Pure and Applied Ultrasonics

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Ultrasonic and Thermodynamic Studies of Binary Liquid Mixtures at 298.15 K


Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad, 211 002, India
2 Electronics Department, Ewing Christian College, Allahabad, India
3 Rashtriya Post Graduate College, Jamuhai, Jaunpur-222001, Uttar Pradesh, India
4 Department of Chemistry, S.P. Mukherjee Government Degree College, Allahabad, India
 

Various thermodynamic properties viz. acoustic impedance, Z, intermolecular free length, Lr molar sound velocity, R, molar compressibility, W, and molecular association MA, have been computed for five binary liquid mixtures (Dimethylcarbonate (DMC) + methanol, DMC + cyclohexane, methanol + cyclohexane, DMC + benzene, and methanol + benzene) at 298.15 K. Interactions between the components of binary systems are studied in terms of excess acoustic impedance, ZE, excess intermolecular free length, LfE deviation in molar sound velocity, ΔR, deviation in molar compressibility, ΔW, and deviation in ultrasonic velocity, Δu. Sign and magnitude of the excess properties give an estimate of strength of the unlike interactions in a iquid mixture. Small positive values of LfE and negative values of ZE and Δu signify the existence of weak interactions between component molecules of all the binary systems. Moreover, an attempt has also been made to examine the validity of several theories and relations, viz. free length theory, Nomoto relation, Junjie relation, Van Deal & Vangeel ideal mixing relation and collision factor theory for the theoretical predictions of ultrasonic velocity in the systems under consideration.
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  • Ultrasonic and Thermodynamic Studies of Binary Liquid Mixtures at 298.15 K

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Authors

N. K. Soni
Department of Chemistry, University of Allahabad, Allahabad, 211 002, India
K. K. Tiwari
Department of Chemistry, University of Allahabad, Allahabad, 211 002, India
D. K. Dwivedi
Electronics Department, Ewing Christian College, Allahabad, India
Vikash Singh
Rashtriya Post Graduate College, Jamuhai, Jaunpur-222001, Uttar Pradesh, India
V. K. Singh
Rashtriya Post Graduate College, Jamuhai, Jaunpur-222001, Uttar Pradesh, India
A. K. Shukla
Department of Chemistry, S.P. Mukherjee Government Degree College, Allahabad, India

Abstract


Various thermodynamic properties viz. acoustic impedance, Z, intermolecular free length, Lr molar sound velocity, R, molar compressibility, W, and molecular association MA, have been computed for five binary liquid mixtures (Dimethylcarbonate (DMC) + methanol, DMC + cyclohexane, methanol + cyclohexane, DMC + benzene, and methanol + benzene) at 298.15 K. Interactions between the components of binary systems are studied in terms of excess acoustic impedance, ZE, excess intermolecular free length, LfE deviation in molar sound velocity, ΔR, deviation in molar compressibility, ΔW, and deviation in ultrasonic velocity, Δu. Sign and magnitude of the excess properties give an estimate of strength of the unlike interactions in a iquid mixture. Small positive values of LfE and negative values of ZE and Δu signify the existence of weak interactions between component molecules of all the binary systems. Moreover, an attempt has also been made to examine the validity of several theories and relations, viz. free length theory, Nomoto relation, Junjie relation, Van Deal & Vangeel ideal mixing relation and collision factor theory for the theoretical predictions of ultrasonic velocity in the systems under consideration.