eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2008 20 3 437 445 jusps-B 1324 article K. Ogra, Lalmani 1 B. L. Koul 1 Department of Physics, National Institute of Technology, (Srinagar) Camp Classes, Old University Campus, Canal Road, Jammu - 180 014 (INDIA) <p style="text-align: justify;">Measurement of the acoustics wave velocity through a fluid combined with physical properties of the medium such as its density, temperature and pressure provide information about thermodynamic parameters of the fluid such as: specific acoustic impedance (Z), adiabatic compressibility (b), apparent molal compressibility (j(k)), molar sound velocity (R), inter-molecular free length (L_f), relative association (RA) and hydration number (S_n). The estimation of the thermodynamic parameters in aqueous solutions of electrolytes of different valence types has been carried and the dependence of these parameters on cationic and anionic radii established. In the case of an electrolyte having anionic radius of 18.75 &Aring; and cationic radius of 1.33 &Aring;, the changes observed in the parameters have been studied , which provide an insight into the influence of cationic size on these parameters. It is found that the size of the cation appreciably influences these parameters.<br /> &nbsp;</p> https://ultraphysicalsciences.org/paper/1324/ Acoustic wave thermodynamic properties aqueous solutions electrolytes