Journal of Pure and Applied Ultrasonics

K. G. Neerajakshi ¹, K. S. V. Krishna Rao ², R. Bharathi ¹, A. B. V. Kiran Kumar ¹, M. C. S. Subha ¹, G. Narayana Swamy ¹

Affiliations
1 Department of Chemistry, Sri Krishnadevaraya University, Anantapur, IN
2 Departnent of Chemistry, Sri Sai Baba National PG College, Anantapur, IN

Abstract

The speeds of sound and densities were measured for the binary liquid mixture of ethylene glycol with n-butylamine (NBA), sec-butylamihe (SBA), tertbutylamine(TBA), n-hexylamine (NHA), n-octylamine (NOA) and cyclohexylamine (CHA) over the whole mole fraction range at 308.15 K. From the experimental data various acoustical parameters, such as isentropic compressibility (k_s), intermolecular free-length (L_f), relative association (R_A), acoustic impendence (z), excess isentropic compressibility (K_s^E), excess inter molecular free-length (L_f^E), excess ultrasonic velocity (U^E) and excess acoustic impedance (Z^E) have been calculated. The behavior, of the present binary liquid mixtures is discussed in terms of possible molecular interactions between unlike molecules. The molecular interactions are discussed from the increasing number of methylene groups in amines, branching and cyclic nature of the amines which indicates the presence of AB type of interactions exist in these binary liquid mixtures.

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M. Eswari Bai ¹, M. C. S. Subha ¹, G. Narayana Swamy ¹, K. Chowdoji Rao ²

Affiliations
1 Department of Chemistry, Sri Krishnadevaraya University, Anantapur-515003, IN
2 Department of Polymer Science and Technology, Sri Krishnadevaraya University, Anantapur-515003, IN

Abstract

Densities and ultrasonic velocities of binary mixtures of 2-butoxy ethanol (BEL) with n-butylamine (NBA), sec-butylamine (SBA), tert-butylamine (TBA), n-hexylamine (NHA), n-octylamine (NOA) and cyclo-hexylamine (CHA), at 308.15 K are measured. From these measured values, various acoustical parameters like acoustic impedance (Z), isentropic compressibility (k_s), intermolecular free length (L_f) and relative association (R_A) have been computed. The various excess properties like excess acoustic impedance (Z^E), excess isentropic compressibility (k_s^E), and excess intermolecular free length (L_f^E) have also been computed from the values of densities and ultrasonic velocities. The results have been discussed interms of various interactions present in these mixtures and self associations in the components.

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