Research Article Open Access

Estimation of Molecular Radii of Organic Liquids and Liquid Mixtures from Ultrasonic Velocity Data

Abstract

Ultrasonic techniques have been employed to compute the molecular radii of fifteen pure liquids for e.g. normal and branched Alkanes, benzene, toluene, p-xylene, 1-chloronaphthalene and 1-chlorobenzene at 298.15 K. the various methods employed include Schaaff’s relation, Rao’s relation, Eyring and Kittel’s relation. These methods were also extended to 32 binary liquid mixtures of benzene, toluene, p-xylene, 1-chloronaphthalene and 1-chlorobenzene with normal and branched alkanes. A comparative study of the molecular radii obtained from all the methods is presented. For further comparison, refractive index method has also been used. The experimental data needed were collected from literature. In this study, we present a comprehensive approach for estimating molecular radii of organic liquids and liquid mixtures based on ultrasonic velocity measurements. By utilizing the relationship between molecular size and the speed of sound in liquids, we propose a robust methodology for extracting molecular radii from experimental ultrasonic velocity data. We validate our approach using a diverse set of organic liquids and liquid mixtures, demonstrating its effectiveness across a wide range of molecular structures and compositions. Our results not only provide valuable insights into the molecular properties of organic liquids but also offer a practical tool for predicting and optimizing various processes in chemistry and industry.

Chandrabhan Singh Niranjan, Rakesh Kumar Singh, Prakash Chandra*

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