Acoustical and excess thermodynamic studies of mixtures of 2-pyrrolidone with 1,3-propanediol and water as well as 1,3-propanediol with water at 308.15 K

作者：Saini Balwinder; Gupta Anjana; Sharma Renu; Bamezai Rajinder K^*

来源：Physics and Chemistry of Liquids, 2014, 52(2): 262-271.

DOI：10.1080/00319104.2013.812020

• isentropic compressibility
• excess molar volume
• excess Gibbs free energy of activation
• 1,3-propanediol
• 2-pyrrolidone

The density (rho), viscosity (eta) and ultrasonic velocity (u) of three mixtures consisting of 2- pyrrolidone with 1,3-propanediol (PD) and water and also of PD and water have been measured as a function of mole fraction at 308.15K. The experimentally collected data has been used to calculate the excess molar volume (V-E), deviation in viscosity (Delta eta), deviation in ultrasonic velocity (Delta u), isentropic compressibility (kappa(s)), deviation in isentropic compressibility (Delta kappa(s)) and excess Gibbs free energy of activation (Delta G*(E)). The Redlich-Kister polynomial equation has been used to fit the derived parameters. The variation in excessive thermodynamic properties as a consequence of possible molecular interactions is discussed.

• 出版日期2014-3-4