ISSN (Print): 2328-3777, ISSN (Online): 2328-3785, ISSN (CD-ROM): 2328-3793 American International Journal of Research in Formal, Applied & Natural Sciences AIJRFANS 19-105; © 2019, AIJRFANS All Rights Reserved Page 12 Available online at http://www.iasir.net AIJRFANS is a refereed, indexed, peer-reviewed, multidisciplinary and open access journal published by International Association of Scientific Innovation and Research (IASIR), USA (An Association Unifying the Sciences, Engineering, and Applied Research) The Study of Excess Molar Volume Deviation in Viscosity of Binary Mixture of Propyl Amine in Benzene and Toluene At 311K Ultrasonically Ruman Singh 1 , R.C.Verma 2 , K.Y.Singh 3 1 Deptt. of Physics, Sun Rise University, Alwar-301001, Rajasthan, INDIA. 2 Deptt. of Chemistry, Janta College, Bakewar (Etawah)-206124, Uttar Pradesh, INDIA. 3Deptt.of Physics, B.S.A. College, Mathura-281004 I. INTRODUCTION Ultrasonic velocity, density and viscosity related parameters such as isentropic compressibility, intermolecular free length, molar and available volume, yield valuable information about intermolecular interaction between the non-polar and polar molecules. The interaction behavior is due to deviation from ideality cause the solvent interaction 1- 3 .Subbarangaiah et al. 4 and Erying&Hirschfelder et al. 5 investigated ultrasonic behavior of aqueous solution and discuss the results by hydrogen bonded complex formation.Verma et al., 6-7 reported various thermodynamic parameters in binary mixtures of higher alcohols with benzene, toluene and carbon tetrachloride.The present investigation deals with the study of excess isentropic compressibility, molar volume and viscosity for binary mixtures of propyl amine in benzene and toluene. II. EXPERIMENTAL Propyl amine, benzene and toluene were used after single distillation. Binary mixtures were prepared by mixing known volume of each liquid in air tight Stoppard glass bottle. Care was taken to avoid contamination during mixing. Ultrasonic velocity was measured by Ultrasonic Interferometer M-80 manufactured by M/S Mittal Enterprises, New Delhi having accuracy of about ±0.057%. Density of pure liquid and binary mixtures was measured by using double walled Picknometer. The Picknometer was calibrated with distilled water. The value obtained were tally with the literature values. The viscosities have been determined by using Ostwald viscometer. The accuracy in viscosity measurement was ±0.0002c.p. Molar volume (Vm) were calculated by following relation Vm= M/ρ (1) Where M is effective molecular weight and ρ is the density. Excess value of molar volume (Vm E ) have been calculated by following formula Vm E =Vmexp-( X1Vm1+X2Vm2) (2) Where Vmexp, Vm1 and Vm2 are molar volumes of mixture and pure component 1 and 2 respectively and X1 and X2 are mole fraction of component 1 and 2. Excess Viscosity has been calculated by using the relation η E = ηexp- (X1η1+X2η2) (3) Abstract: Densities, ultrasonic velocities and viscosities of propyl amine with benzene and toluene have been meas over entire range of composition at 306 K and atmospheric pressure. The computed acoustic and thermodynamic prope of propyl amine in benzene and toluene will give excess values of isentropic compressibility, molar volume and visco The excess values will decide the nature and extent of molecular interaction of propyl amine with benzene and toluen 306K. Keyword: molar volume, viscosity, propyl amine, benzene, toluene