@article{Muhammad A. R. Khan_Mohammed Sohel_I Chowdhury_Shamim Akhtar_2022, title={Sound Velocities in Aqueous Solutions of n-Butylamine between 303.15 and 323.15 K: Experiment and Theory}, volume={9}, url={https://publisher.unimas.my/ojs/index.php/JASPE/article/view/4636}, DOI={10.33736/jaspe.4636.2022}, abstractNote={<p><em>Density (ρ) and sound velocity (u) have been measured for aqueous solutions of n-butylamine</em> <em>( W + NBA) in the whole range of composition at an interval of 5 K. Deviation in Sound Velocity (∆u), Isentropic Compressibility (K<sub>s</sub>), Excess Isentropic Compressibility (K<sub>s</sub><sup>E</sup>), Specific Acoustic Impedance (Z), Rao’s Constant (R) and Wada’s Constant (W) have been calculated from measured u and ρ. ∆u versus x<sub>2</sub> curve </em><em>is</em><em> negative and with the increment of temperature, ∆u decreases;</em> <em>K<sub>s</sub></em><em> values of W + NBA are all positive whereas K<sub>s</sub><sup>E</sup> values are all negative. </em><em>All the above outcomes are interpreted in terms of molecular interaction e</em><em>specially hydrogen bonding and hydrophobic hydration </em><em>between water and n-butylamine.</em><em> Moreover, e</em><em>xperimental data for u correlated with some theoretical equations. The relations are Nomoto’s Relation (u<sub>N</sub>), Impedance Relation (u<sub>IR</sub>), the Rao’s specific velocity method relation (u<sub>R</sub>), Van Deel’s ideal mixing relation (u<sub>IMR</sub>) and theoretical sound velocity according to Free Length Theory (u<sub>FLT</sub>). The validity of these relations with experimental values has been tested by measuring</em> <em>standard percentage deviation (</em><em>) and average percentage error (APE).</em></p&gt;}, number={2}, journal={Journal of Applied Science & Process Engineering}, author={Muhammad A. R. Khan and Mohammed Sohel and I Chowdhury, Faisal and Shamim Akhtar}, year={2022}, month={Oct.}, pages={1177-1196} }