摘要:

IntroductionNew interest has been revived in the study of thermoacoustical parameters in the view of temperature and pressure coefficient of the bulk modulus. Several approaches are found in literature1to evaluate thermoacoustical parameters for a wide variety of liquids. Pandeyet al.2,3made an effort to estimate these parameters for liquids over a wide range of temperature and pressure, and to analyse the interrelationship among various thermoacoustical properties. Tabhaneet al.4used expansivity data to compute thermoacoustical parameters in binary liquid mixtures. Very recently, Pandeyet al.1determined the available volume of few liquids and binary mixture of acetone + methyl iodide at varying temperatures by computing some of the thermoacoustical parameters.Available volume is related to another very useful quantity, intermolecular free-length (Lf), which has been extensively used in literature5–7to study the intermolecular interactions in mixtures. The present paper is a continuation of our previous work1involving computation of available volume of few pure organic liquids and a binary liquid mixture, and aims to compute thermoacoustical parameters for four ternary and two quaternary liquid mixtures. Available volume, computed from thermoacoustical parameters, has been used to obtain intermolecular free-length of systems under consideration. The calculated values ofLfare compared with the values estimated from well-established thermodynamic and ultrasonic methods.8To the best of our knowledge, this is the first time when intermolecular free-length has been evaluated using thermoacoustical parameters, and compared with the values obtained by other methods.

ISSN:1460-2733    

DOI:10.1039/b307435h

出版商:RSC    

年代:2003

数据来源: RSC