Research Journal of Chemical Sciences ______________________________________________ ISSN 2231-606X Vol. 3(5), 10-13, May (2013) Res. J. Chem. Sci. International Science Congress Association 10 Ultrasonic Studies and Molecular Interactions of Binary Liquid Mixture of Ethylamine and Benzyl Alcohol at 313.15 Saxena Chandra Mohan, Saxena Archna and Shukla Naveen Kumar Department of Chemistry, D.B.S. College Govind Nagar Kanpur, UP, INDIA Available online at: www.isca.in Received 27th April 2013, revised 13th May 2013, accepted 10th June 2013Abstract The experimental values of the parameters like - ultrasonic velocity (u), isentropic compressibility (), intermolecular free length (L) and viscosity () of ethylamine and benzyl alcohol in the pure state as well as mixture over the whole composition range at 313.15K. The excess values of available volume (V) ,molar volume (V) and Nissan,s parameter(d) have been calculated. It is used in so many fields of scientific researches in physics, chemistry, biology, medicines and industry. About molecular packing , molecular motion and various types of interactions and their strength, influenced by the size ,shape and the chemical nature of component molecules are also provided by these parameters. Keywords: Binary mixture, ethylamine, benzyl alcohol and ultrasonic interferometer. Introduction A considerable progress has been made in theoretical understanding of liquid-liquid mixture The thermodynamic study of binary mixture have attracted much attention of scientist and experimental data on a number systems are available from review and publication2-8. Many investigations9-18 have been engaged in the task of collecting more and more data and explaining in terms of the properties of pure liquid. Viscosity, density measurements and the derived properties from these are excellent tools to detect solute- solute and solute-solvent interactions. The present paper deals with the measurement of density, viscosity () and excess thermodynamic properties i.e. Molar volume (V), isentropic compressibility (), intermolecular free length (L) and Nissan parameter (d) have been calculated. This technique using ultrasonic instrument is in the tremendous use in measuring the rate of flow of blood through the human body and getting images of vital organs of the body like kidney, liver, blood vessel, fetus etc. Material and MethodsEthylamine and Benzyl alcohol were obtained from E-Merck and BDH. They were purified by the recommended methods. The volume of mixing binary liquid mixtures is given by = V –(X--X ) Where V is molar volume. V1 and V2 are molar volume of pure components and X1 and X2 are mole fractions of the components (1) one and (2) two. In the present study density, ultrasonic, velocity, molar volume, isentropic compressibility, intermolecular free length, Nissan’s parameter and their excess values have been reported. Results and DiscussionThe results are shown in tables 1 to 4. Deviations in the properties computed demonstrated that their exist a molecular interaction between the liquid mixture of unlike molecules. These may be attributed to the change the adhesive and cohesive forces. The experimental values of ultrasonic velocities, densities, molar volumes and their excess values for the system of ethylamine and benzyl alcohol are shown in table - 1 at 313.15K. The table–2 shows isentropic compressibility, intermolecular free length and their excess values for the system (ethylamine +benzyl alcohol) at 313.15K. Table–3 shows available volume and their excess values for the system (ethylamine +benzyl alcohol) at 313.15K. Table – 4 shows the viscosity and their excess values, L n (Logarithm of excess value of viscosity) and Nissan’s parameter (d) have been calculated for the system (ethylamine +benzyl alcohol) at 313.15K. Thus the mixture of ethyl amine and benzyl alcohol is a polar – polar system. In case of ethylamine + benzyl alcohol at 313.15K, the excess isentropic compressibility () and the intermolecular free length (L) are negative shown in (table-2) but the value of Nissan’s parameter (d) shown in (table–4) is positive. Thus the electrons of benzene ring is also supposed to be involved in the specific interaction as shown below 5 CH - - - O - - -H- - - - N - -- - H C H (Ethyl amine + Benzyl alcohol ) Research Journal of Chemical Sciences ___________________________________________________________ ISSN 2231-606XVol. 3(5), 10-13, May (2013) Res. J. Chem. Sci. International Science Congress Association 11 The negative values of excess molar volume( Vm ), excess available volume (Va ) (table 1 and 3) and excess viscosity ) (table – 4 ) may be different molecular size attributed to the presence of dispersive forces between the mixing components and suggest the presence of specific intermolecular interactions of the binary mixture, while the positive values Vm, Va and may be due the presence of strong and specific molecular interactions between the unlike molecules of the binary mixture. Table- 1 Ultrasonic velocities, Densities, Molar volumes and their excess values for the system Ethaylamine + Benzyl alcohol at 313.15 K Mole fraction of Ethylamine (X 1 ) Ultrasonic Velocity m/sec Density g/ml Molar Volume (exp) ml/mole Molar Volume (add) ml/mole Excess molar Volume ml/mole 0.0000 1482 1.0295 105.04 105.04 0.00 0.1025 1481 1.0210 99.57 99.95 -0.38 0.2008 1480 1.0072 94.78 95.08 -0.30 0.2992 1479 0.9917 90.00 90.21 -0.21 0.4006 1474 0.9740 85.07 85.19 -0.12 0.4986 1467 0.9552 80.29 80.33 -0.04 0.5991 1457 0.9319 75.49 75.36 +0.15 0.6992 1450 0.9050 70.75 70.40 +0.35 0.7992 1443 0.8750 65.97 65.45 +0.52 0. 8986 1434 0.8409 61.19 60.53 +0.66 1.0000 1417 0.8121 55.51 55.51 0.00 Table - 2 Isentropic compressibilities, intermolecular free length and their excess values for the system Ethylamine + Benzyl acohol at 313.15K Mole fraction of ethylamine Isentropic compressibility (exp) cm/dyne X1012Isentropic compressibiliy (add) cm/dyneX1012Excess isentropic compressibilitycm/dyneX112Inter molecular Free length (exp) AInter molecular Free length (add) AExcess inter molecular Free Length A 0.0000 44.22 44.22 0.00 0 .4269 0.4269 0.0000 0.1025 44.65 45.96 - 1.31 0.4289 0.4347 - 0.0058 0.2008 45.32 47.65 - 2.33 0.4321 0.4420 - 0.0099 0.2992 46.09 49.32 - 3.23 0.4358 0.4495 - 0.0137 0.4006 47.25 51.12 - 3.87 0.4413 0.4571 - 0.0158 0.4986 48.64 52.74 - 4.10 0.4477 0.4646 - 0.0169 0.5991 50.54 54.45 - 3.91 0.4564 0.4722 - 0.0158 0.6992 52.55 56.17 - 3.62 0.4653 0.4798 - 0.0145 0.7992 54.88 57.88 - 3.00 0.4656 0.4874 - 0.0118 0.8986 57.83 59.58 - 1.75 0.4882 0.4949 - 0.0067 1.0000 61.32 61.32 0.00 0.5027 0.537 0.0000 Table-3Available volumes and their excess values for the system Ethylamine + Benzyl alcohol at 313.15K Mole fraction of ethyl amine X 1 Available volume (exp ) ml /mole Available volume ( add ) ml / mole Excess available volume ml /mole 0.0000 7.74 7.74 0.00 0.1025 7.40 7.59 - 0.19 0.2008 7.10 7.45 - 0.35 0.2992 6.80 7.31 - 0.51 Research Journal of Chemical Sciences ___________________________________________________________ ISSN 2231-606XVol. 3(5), 10-13, May (2013) Res. J. Chem. Sci. International Science Congress Association 12 0.4006 6.69 7.16 - 0.47 0.4986 6.67 7.04 - 0.37 0.5991 6.65 6.90 - 0.25 0.6992 6.63 6.75 - 0.12 0.7992 6.47 6.61 - 0.14 0.8986 6.34 6.47 - 0.13 1.0000 6.34 6.34 0.00 Table-4 Viscosity and their excess values, LnE and Nissan’s parameter (d) for the system Ethylamine + Benzyl alcohol at 313.15K Mole fraction of ethylamine 1 Viscosity (exp ) Cp Viscosity (add ) Cp Excess Viscosity Cp Ln‘d’ 0.0000 2.017 2.017 0.000 0.000 0.000 0.1025 1.935 1.875 + 0.060 + .077 + 0.837 0.2008 1.786 1.738 + 0.048 + 0.110 + 0.685 0.2992 1.632 1.603 + 0.019 + 0.134 + 0.639 0.4006 1.451 1.464 - 0.009 + 0.135 + 0.562 0.4986 1.267 1.328 - 0.061 + 0.099 + 0.396 0.5991 1.073 1.190 - 0.117 + 0.059 + 0.245 0.6992 0.920 1.051 - 0.131 + 0.022 + 0.104 0.7992 0.793 0.914 - 0.121 - 0.011 - 0.069 0.8986 0.694 0.776 - 0.082 - 0.031 - 0.340 1.0000 0.637 0.637 0.000 0.000 0.000 AcknowledgementAuthors are thankful to Dr. A. K. Srivastava, Principal, D.B.S. (P.G.) 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