Ultrasonic Speeds, Molar Isentropic Compressions and FTIR analysis of aqueous solutions of 2-dialkylaminoethanols from 293.15 to 313.15 K. (2nd January 2022)

• Record Type: Journal Article
• Authors: Awasthi, Anjali
• Is Part Of: Physics and chemistry of liquids. Volume 60:Number 1(2022)
• Page Start: 33
• Page End: 46
• Publication Date: 2022-01-02
• Subjects: Ultrasonic speed -- 2-dialkylaminoethanol -- water -- isentropic compressions -- molecular interaction; Liquids -- Periodicals; 530.4205
• DOI: 10.1080/00319104.2021.1907844
• Languages: English
• ISSNs: 0031-9104

Abstract

ABSTRACT: The present work reports the experimental densities ρ and ultrasonic speeds u of binary mixtures of 2-dimethylaminoethanol (2-DMAE) and 2-diethylaminoethanol (2-DEAE) with water at temperatures 293.15, 303.15 and 313.15 K over the entire composition range. Excess molar volume V E, excess ultrasonic speed u E, excess isentropic compressibility κ s E, excess intermolecular free-length L f E and excess molar isentropic compression K s, m E were calculated using the experimental data. The variations of excess parameters are modelled by the Redlich-Kister polynomial equation rendering strong deviations from ideality. The excess partial molar compressions K ‾ s, m, 1 E and K ‾ s, m, 2 E, excess partial molar compressions at infinite dilution K ‾ s, m, 1 0 E and K ‾ s, m, 2 0 E expose about the structural configuration and molecular bonding in the aqueous binary system. The consequences of aqueous 2-DMAE/2-DEAE system may become a driving force for hydrophobic hydration to support solute-solvent hydrophilic interaction. The pattern and position of FT-IR spectra (recorded at room temperature 293.15 K) was consistent with the variations of excess parameters.