VOLUETRIC, VISCOSITY AND ULTRASONIC BEHAVIOUR OF n-butyl PROPIONATE + ETHER (THF,,4-DIOXANE, ANISOLE AND BUTYL VINYL ETHER) IXTURES AT 303.5, 308.5 AND 33.5 K. V. Rathnam, [a]* D. R. Ambavadekar, [a]. Nandini [b] Keywords: density, viscosity, speed of sound, binary mixture, n-butyl propionate Density, viscosity and speed of sound of binary liquid mixtures of butyl propionate with tetrahydrofuran,,4-dioxane, anisole and butyl vinyl ether were measured at ( 303.5,308.5 and 33.5 ) K and over the entire composition range. From the experimental data values of excess volume V E, viscosity deviations η, deviation in speeds of sound u, isentropic compressibility Ks and deviation in isentropic compressibility KS, have been determined. The speeds of sound data have been analysed on the basis of Jouyban Acree and Vandeal Vangeel models. Corresponding Author* Tel: +9-8976545095 Fax: 0-533767 E-ail: mvrathnam58@rediffmail.com [a] Physical Chemistry Research Laboratory, B. N. Bandodkar College of Science, Thane-40060 - India., Tel.: +9-989558695 Fax: 0 533767, Email: DABAVADEKAR@yahoo.co.in [b] Department of Chemistry, Dr. P.R.Ghogrey Science College, Deopur- Dhule-44005 India, Tel.: +9. 56.756 Fax: +9.56.7340, E-mail: m.nandinikumar@gmail.com Introduction A number of theories, have been proposed to compute the useful thermodynamic properties of liquids and liquid mixtures. Parallel to this many experimental techniques have been developed. In liquid mixture studies attractive forces like dipole dipole interactions, hydrogen bond type forces and dipole-induced dipole interactions lead to non ideal effects. 3 However quantitative estimation of such interactions is important in order to achieve a fundamental understanding about the liquid state properties, which are useful in many specific disciplines like chemistry, physics, engineering, and biology. Numerous studies 4-0 have been reported related to the interactions in binary liquid mixtures of esters with a variety of organic solvents. However no attempts have been made to study interactions in the binary mixtures containing butyl propionate as a common component. Esters have found wide spread use in several industries and automotive applications due to their excellent performance characteristics such as solvency and evaporation rate. Butyl propionate is widely used for high solid coatings in automotive finishes, appliance coatings, cleaning fluids, enamels, lacquers, and printing inks. While ethers are commonly used as powerful non-polar solvents for both industrial applications and for chemical reactions. In medical applications ethers are used as a general anaesthetic for surgeries. Its use replaced chloroform which was extremely toxic. In automotive application an ether is added to the fuel in race cars for extra power. Therefore the study of interaction of esters with ethers will throw light on designing, separation operations such as distillation etc. In view of these above importance the present research has been undertaken with the objective of investigating the molecular interactions of the binary mixtures of butyl propionate with ethers. In continuation of our earlier work, -4 in this paper we report the density, viscosity and speed of sound of binary liquid mixtures of butyl propionate + tetrahydrofuran, butyl propionate +,4-dioxane, butyl propionate + anisole, and butyl propionate + butyl vinyl ether at (303.5, 308.5 and 33.5) K over the entire range of composition of n-butyl propionate. From the experimental values excess volume V E, deviation in viscosity η, deviation in speeds of sound u, isentropic compressibility Ks and deviation in isentropic compressibility K S, have been calculated. This work also provides a test of empirical equations proposed by Jouyban Acree 5,6 and Vandeal Vangeel 7 to correlate speeds of sound data of the binary liquid mixtures in terms of pure component properties. Experimental aterials: Extra pure butyl propionate, tetrahydrofuran,,4-dioxane, anisole and butyl vinyl ether all Fluka AG were procured from the Aldrich company. The mass fraction purities as determined by gas chromatography (HP 860) using FID were, butyl propionate (> 0.998), tetrahydrofuran (> 0.996),,4-dioxane (>0.997), anisole (> 0.998), and butyl vinyl ether (>0.996). Before use the pure chemicals were stored over 0.4 nm molecular sieves for 7 h to reduce water content if any and were degassed at low pressure. ethods: The density of pure liquids and their binary mixtures were measured with Anton Paar DA 4500 density meter with certified precision of better than ±x 0-5 g.cm -3 operated in the static mode and the cell was regulated to ± 0.0K with solid state thermostat. The apparatus was calibrated once a day with dry air and double Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 64
distilled freshly degassed water. The uncertainty in the density measurements was found to be less than ±0.000 g cm -3. Airtight stoppered bottles were used for the preparation of the mixtures. ass measurements accurate to ± 0.0 mg were made on a digital electronic balance (ettler AE 40, Switzerland). Each mixture was immediately used after it was well mixed by shaking. The resulting mole fraction uncertainty was estimated to be less than + 0.000. Viscosities were determined using an Ubbelohde viscometer with an uncertainty of ±0.005 mpa s. The detailed method of measurement of viscosity has been described earlier. The speeds of sound at frequency of Hz were determined using single crystal variable path interferometer ( F-8 ittal Enterprises, New Delhi, India). The uncertainty in speed of sound was found to be ± m s -. Results and Discussion The results of density ρ, excess volume V E, viscosity η, and speed of sound u, isentropic compressibility K S of the studied binary mixtures at (303.5, 308.5 and 33.5) K are given in Table. The excess volume V E (cm 3 mol - ) was calculated using the relation E V ( x ) x where x, and ρ are the mole fraction, molar mass, and density respectively of pure components and. ρ is the density of the liquid mixture. The isentropic compressibility K S was calculated using Newton-Laplace equation: () Figure. Curves of excess volumes (V E ) vs. mole fraction for the binary mixtures. Butyl propionate + Tetrahydrofuran at (, 303.5 K;, 308.5 K; Δ, 33.5 K; butyl propionate +,4-dioxane at (, 303.5 K; җ, 308.5 K;, 33.5 K; butyl propionate + anisole at O, 303.5 K; +, 308.5 K;, 33.5 K; butyl propionate + butyl vinyl ether, 303.5 K;, 308.5 K;, 33.5 K. The standard deviations for V E, Δη, u and ΔK S were calculated using the relation 0.5 E E ( Yexp Y ) ( Y ) cal (5) ( D N) where D and N are the number of experimental data and equation parameters respectively. The coefficients of Eq.4 and the standard deviations of Eq.5 were presented in Table. K S u () The deviations in viscosity Δη, speeds of sound u, and isentropic compressibility K S were calculated using the general equation Y Ym Y Y (3) where ΔY is the deviation or excess property in question, Y m refers to the property of the mixture, x Y and x Y refer to the mole fraction and specific property of the pure components and respectively. The results of V E, Δη, u and ΔKs, for the binary mixtures at ( 303.5, 308.5 and 33.5 ) K were graphically represented in Figures -4. Further these results were fitted to the Redlich-Kister 8 polynomial equation by the method of least squares to derive the binary solution coefficients A 0, A, A. Y x A 0 A ( x ) A ( x ) (4) Figure. Curves of deviation in viscosity (Δη) Vs mole fraction for the binary mixtures. butyl propionate + tetrahydrofuran at (, 303.5 K;,308.5 K; Δ, 33.5 K; butyl propionate +,4- dioxane at, 303.5 K; җ, 308.5 K;, 33.5 K; butyl propionate + anisole at O, 303.5 K; +, 308.5 K;, 33.5 K; butyl propionate + butyl vinyl ether, 303.5 K;, 308.5 K;, 33.5 K Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 643
Table Values of density ρ, excess volume V E, viscosity η, speed of sound u, isentropic compressibility KS,for the binary liquid mixtures. x ρ, g.cm -3 V E, cm 3.mol - η, mpa.s u, m.s - KS, Tpa - Butyl propionate() + Tetrahydrofuran () T=303.5 K 0.0000 0.8787 0.439 48 730.7 0.0596 0.8784-0.080 0.465 36 745. 0.76 0.8780-0.45 0.487 4 760. 0.900 0.8773-0.99 0.53 6 770.9 0.667 0.8764-0.30 0.540 08 787. 0.3539 0.8754-0.55 0.570 96 798.6 0.45 0.874-0.44 0.593 9 805. 0.568 0.878-0.3 0.66 88 8.8 0.6893 0.874-0.0 0.645 84 88.6 0.834 0.8699-0.47 0.675 84 80.0.0000 0.8679 0.700 88 86.4 x T=308.5 K 0.0000 0.8730 0.49 8 759.6 0.0596 0.8730-0.093 0.450 0 769.8 0.76 0.877-0.60 0.469 780.3 0.900 0.870-0.7 0.49 04 79.3 0.667 0.87-0.7 0.53 96 80.6 0.3539 0.870-0.89 0.537 88 84.5 0.45 0.8688-0.8 0.557 84 8.3 0.568 0.8674-0.7 0.58 80 88. 0.6893 0.8659-0.3 0.604 76 835. 0.834 0.8643-0.63 0.69 7 84.4.0000 0.86 0.653 7 844.5 x T=33.5 K 0.0000 0.8669 0.394 785.3 0.0596 0.8670-0.0 0.409 96 806. 0.76 0.8668-0.87 0.47 84 8.8 0.900 0.8664-0.64 0.445 7 840.0 0.667 0.8657-0.308 0.467 64 85. 0.3539 0.8649-0.33 0.49 56 864.9 0.45 0.8638-0.36 0.5 48 878.0 0.568 0.867-0.30 0.53 48 879. 0.6893 0.865-0.7 0.557 44 886.6 0.834 0.860-0.86 0.58 44 888..0000 0.8583 0.607 56 87.9 Butyl propionate() +,4-Dioxane () x T=303.5 K 0.0000.08.090 30 56. 0.06.0074-0.035.03 96 59.0 0.6 0.993-0.057 0.978 80 65. 0.987 0.9769-0.08 0.97 60 644.8 0.785 0.964-0.093 0.88 48 667.8 0.3653 0.946-0.096 0.840 8 700.9 0.4599 0.930-0.088 0.80 0 7.7 0.5687 0.955-0.08 0.777 743.6 0.6873 0.9004-0.059 0.747 00 77.3 0.838 0.884-0.09 0.7 9 796.0.0000 0.8679 0.700 88 86.4 Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 644
Table. (contg.) x T=308.5 K 0.0000.073 0.999 3 57.3 0.06.009-0.040 0.949 9 597.9 0.6 0.9869-0.076 0.907 76 6.3 0.987 0.975-0.07 0.865 56 65.5 0.785 0.9560-0.4 0.89 40 680.3 0.3653 0.9407-0.33 0.793 4 709.6 0.4599 0.956-0.30 0.764 735.5 0.5687 0.90-0.6 0.737 00 763. 0.6873 0.8949-0.00 0.705 88 79.8 0.838 0.8786-0.059 0.678 80 87.4.0000 0.86 0.653 7 844.5 x T=33.5 K 0.0000.06 0.946 304 58.6 0.06 0.9966-0.058 0.90 80 6.4 0.6 0.988-0.096 0.860 64 637.5 0.987 0.9666-0.7 0.8 34 679.4 0.785 0.953-0.46 0.786 4 73.3 0.3653 0.936-0.58 0.75 00 74.8 0.4599 0.9-0.46 0.76 84 774.4 0.5687 0.9058-0.35 0.695 7 803.7 0.6873 0.8909-0.5 0.664 56 840.0 0.838 0.8748-0.089 0.639 5 86.4.0000 0.8583 0.607 56 87.9 Butyl propionate() + Anisole () x T=303.5 K 0.0000 0.9853 0.97 388 54.6 0.0760 09739-0.054 0.8933 356 558.4 0.56 0.963-0.083 0.8683 330 587.5 0.390 0.95-0.33 0.849 304 68.3 0.38 0.9394-0.44 0.875 80 649.7 0.430 0.977-0.579 0.7935 56 683.3 0.548 0.958-0.59 0.7736 40 70. 0.639 0.9038-0.38 0.7538 8 733.7 0.7474 0.899-0.3 0.7363 763.3 0.8646 0.8804-0.07 0.79 00 788.8.0000 0.8879 0.700 88 86.4 x T=308.5 K 0.0000 0.979 0.8494 368 54.7 0.0760 0.9680-0.075 0.800 344 57.9 0.56 0.9565-0.5 0.7958 34 596.4 0.390 0.945-0.50 0.770 304 6. 0.38 0.9336-0.7 0.7484 76 657.9 0.430 0.90-0.97 0.77 56 687.5 0.548 0.90-0.0 0.7099 38 76.8 0.639 0.8983-0.00 0.6948 0 747.9 0.7474 0.8864-0.73 0.6798 04 778. 0.8646 0.874-0.8 0.667 88 809.9.0000 0.86 0.658 7 844.5 Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 645
Table. (contg.) x T=33.5 K 0.0000 0.978 0.764 348 56.6 0.0760 0.96-0.0 0.736 34 59.9 0.56 0.950-0.57 0.73 96 66. 0.390 0.940-0.4 0.693 76 653. 0.38 0.989-0.54 0.673 5 686.8 0.430 0.975-0.74 0.654 8 7.8 0.548 0.9059-0.8 0.64 75.5 0.639 0.894-0.67 0.630 96 78.8 0.7474 0.884-0.9 0.6 84 808.4 0.8646 0.870-0.53 0.64 68 84.6.0000 0.8583 0.607 56 87.9 Butyl propionate() + Butyl Vinyl Ether () x T=303.5 K 0.0000 0.774 0.387 084 099.4 0.0874 0.7839-0.07 0.405 04 046.6 0.79 0.7939-0.43 0.45 0 004. 0.78 0.8035-0.80 0.447 3 97. 0.3683 0.83-0.4 0.47 44 939.6 0.466 0.86-0.3 0.499 60 905.6 0.5644 0.837-0.9 0.530 68 88.3 0.670 0.84-0.0 0.567 76 859.6 0.7778 0.850-0.45 0.606 84 839.0 0.8865 0.859-0.09 0.65 88 84.8.0000 0.8679 0.700 88 86.4 x T=308.5 K 0.0000 0.768 0.374 07 3.8 0.0874 0.7773 0.047 0.39 088 086.8 0.79 0.7865 0. 0.409 00 050.8 0.78 0.7957 0.44 0.49 06.3 0.3683 0.805 0.63 0.45 8 976. 0.466 0.844 0.73 0.476 40 944.8 0.5644 0.836 0.64 0.505 48 9.3 0.670 0.8333 0.5 0.536 56 898.0 0.7778 0.849 0.08 0.570 64 875.6 0.8865 0.854 0.06 0.609 68 859.9.0000 0.86 0.653 7 844.5 x T=33.5 K 0.0000 0.7633 0.354 064 57. 0.0874 0.77 0.098 0.369 076 8.5 0.79 0.7875 0.80 0.387 088 08. 0.78 0.7905 0.48 0.405 00 045.5 0.3683 0.7999 0.86 0.45 0.0 0.466 0.8093 0.98 0.447 4 978.0 0.5644 0.887 0.73 0.474 3 953. 0.670 0.886 0.46 0.50 40 98.6 0.7778 0.8385 0.7 0.534 48 904.9 0.8865 0.8483 0.093 0.569 5 888.3.0000 0.8583 0.607 56 87.9 Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 646
Figure 4 shows deviations in isentropic compressibility K S, From the curves it was observed that for the systems butyl propionate with tetrahydrofuran,,4-dioxane and anisole the K S values are positive, while for butyl propionate + butyl vinyl ether the K S values are negative over the entire range of composition at the studied temperature. The negative values in case of butyl vinyl ether may be attributed to the weak dipolar interactions between unlike molecules which lead to decrease in the free length, and increase in the speed of sound with increase in composition of n-butyl propionate. The positive K S values may be due to the fact that the free length is not affected much. Figure 3. Curves of deviation is speed of sound (Δu) Vs mole fraction for the binary mixtures. Butyl propionate + Tetrahydrofuran at, 303.5 K;, 308.5 K; Δ, 33.5 K; Butyl propionate +,4-Dioxane at, 303.5 K; җ, 308.5 K;, 33.5 K; Butyl propionate + Anisole at O, 303.5 K; +, 308.5 K;, 33.5 K; Butyl propionate + Butyl vinyl ether, 303.5 K;, 308.5 K;, 33.5 K. The excess molar volume V E against mole fraction x were graphically represented in Figure.The V E values for butyl propionate with tetrahydrofuran,,4-dioxane, anisole are negative over the whole composition range at all studied temperatures. These negative values were found to increase with increase in temperature which suggest the increase in interactions between unlike molecules at high temperature. For the system butyl propionate + butyl vinyl ether the V E values are negative at 303.5 K, but as the temperature is increased the V E values change from negative to positive over the entire range of mole fraction. The negative values indicate the contraction in volume upon mixing butyl propionate with ethers due to association in dissimilar molecules 9 while the positive V E values indicate the weak interactions and may be due to dispersive forces involving between dissimilar molecules. The plots of Δη vs. mole fraction x of butyl propionate at 303.5, 308.5 and 33.5 K are presented in Figure. The Δη values for butyl propionate + tetrahydrofuran exhibits positive deviation at all studied temperatures. These positive Δη values decrease with increase in temperature. For butyl propionate +,4-dioxane, butyl propionate + anisole and butyl propionate + butyl vinyl ether the Δη values are negative over the entire range of composition at the studied temperature. The effect of temperature on Δη values is significant as these values found to either decrease or increase systematically with rise in temperature. As suggested by Fort and oore 0 the negative Δη values in our present study indicate the presence of dispersion forces, while the positive values may be due to the presence of specific interactions between the unlike molecules in the mixtures. Figure 3 shows that deviations in speeds of sound u, values are negative for butyl propionate + tetrahydrofuran, butyl propionate +,4-dioxane, butyl propionate + anisole, while for butyl propionate + butyl vinyl ether the u values are positive over the entire range of composition at the studied temperature. Figure 4. Curves of deviation in isentropic compressibility (ΔKS) Vs mole fraction for the binary mixtures. Butyl propionate + Tetrahydrofuran at, 303.5 K;, 308.5 K; Δ, 33.5 K; Butyl propionate +,4-Dioxane at, 303.5 K; җ, 308.5 K;, 33.5 K; Butyl propionate + Anisole at O, 303.5 K; +, 308.5 K;, 33.5 K; Butyl propionate + Butyl vinyl ether, 303.5 K;, 308.5 K;, 33.5 K. In this study an attempt has also been made to find the predictive ability of the empirical relations proposed by Jouyban Acree 5-6 and Vandeal Vangeel 7 to correlate the speed of sound data of the studied binary mixtures in terms of pure components. The empirical relations used are as follows: Jouyban Acree 5-6 ln u ln u ln u where x x x x ( x ) A A 0 T T A x x ( x ) T (6) A 0, A, and A.are the model constants u, u and u are the speed of sound of mixture and pure components and respectively. T is the absolute temperature at which the data has been obtained. Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 647
Table. Derived parameters of excess functions and standard deviation of binary liquid mixtures Function T/K A0 A A σ Butyl propionate() + Tetrahydrofuran () V E 303.5-0.974 0.8-0.4587 0.005 308.5 -.38 0.745-0.6654 0.005 33.5 -.77 0.336-0.654 0.005 η 303.5 0.385-0.0366 0.08 0.00 308.5 0.00-0.0300 0.08 0.00 33.5 0.0889-0.006-0.0054 0.00 Δu 303.5-5.39 37.97-9.48.3 308.5-73.88 3.64-3.77.0 33.5-4.75 35.3-65.09.3 ΔKs 303.5 4.409-3.60.3 0.7 308.5 9.58 -.3-0.6 0.4 33.5 9.845-3.099 7.565 0.0 Butyl propionate() +,4-Dioxane () V E 303.5-0.3496 0.94-0.040 0.003 308.5-0.5094 0.90-0.9365 0.003 33.5-0.5849 0.65-0.3490 0.004 η 303.5-0.397 0.7-0.0849 0.00 308.5-0.9 0.4-0.0858 0.00 33.5-0.578 0.355-0.055 0.00 Δu 303.5-5.69 66.07-45.6.40 308.5-4.97 47.43-5.39.0 33.5-09.34 4.7-3.35 3.34 ΔKs 303.5 6.97-3.857.780 0.7 308.5 5.685 -.69 -.36 0. 33.5 4.397 3.78.443 0.39 Butyl propionate() + Anisole () V E 303.5-0.63 0.0830-0.073 0.006 308.5-0.8079-0.80-0.37 0.006 33.5 -.95 0.005-0.30 0.006 η 303.5-0.35 0.0463 0.00 0.00 308.5-0.473 0.053 0.0 0.00 33.5-0.64 0.056-0.0004 0.00 Δu 303.5-73.83 64.54 3.53.84 308.5 -.69 6.7 35.95.0 33.5-44.35 34.95 3.73.97 ΔKs 303.5.460 -.45-3.504 0.0 308.5 6.036 0.585-4.467 0.0 33.5 0.84-0.394-4.965 0.3 Butyl propionate() + Butyl Vinyl Ether () V E 303.5-0.9004 0.074-0.0093 0.005 308.5 0.693-0.0686 0.058 0.006 33.5.76-0.37-0.678 0.005 η 303.5-0.34-0.067 0.009 0.00 308.5-0.07-0.03-0.00 0.00 33.5-0.09-0.08-0.0003 0.00 Δu 303.5 00.44 0.56 30.8.6 308.5 80.84 4.43-5..45 33.5 65.63.95-4.63 0.65 ΔKs 303.5-3.5 4.393-7.344 0.3 308.5-0.4.495.75 0.6 33.5-7.834 0.440.36 0. Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 648
Table 3. Adjustable parameters and standard percentage deviations of models of speed of sound for binary liquid mixtures T/K Jouyban-Acree Vandeal-Vangeel A0 A A σ ( % ) σ ( % ) Butyl propionate() + Tetrahydrofuran () 303.5 0.409-6.836 3.300 0.698 0.09 308.5 0.463-8.73 3.99 0.564 0.59 33.5 0.768-8.30 3.99 0.56 0.040 Butyl propionate() +,4-Dioxane () 303.5-0.3 8.99-30.700 0.8 0.56 308.5-9.894 8.846-30.699 0.60 0.30 33.5-0.958 9.68-30.700 0.59 0.45 Butyl propionate() + Anisole () 303.5-0.900 5.706-7.656 0.90 0.9 308.5-0.900 6.047-9.06 0.80 0.9 33.5-0.900 5.796-30.664 0.575 0.74 Butyl propionate() + Butyl Vinyl Ether () 303.5-0.900.036-8.439 0.086 0.307 308.5 -.5064-0.80 3.333 0.90 0.63 33.5-0.900 3.35-7.76 0.056 0.33 Vandeal Vangeel 7 x x u x u u where and are molecular weights of the pure components and respectively. The speed of sound data correlated with the Eqs (6 and 7) were compared with the experimental data in terms of percentage standard deviation σ(% )as obtained by relation where n represents the number of data points in each set and k the number of numerical coefficients of equation (6 and 7). u cal has been obtained from model equation (6 and 7)The values of parameters of Equation 7 and the percentage standard deviations σ(%) of equation ( 8) are given in the Table 3. A perusal of Table 3 shows that the σ(%) values obtained by Vandeal Vangeel relation are very low for systems butyl propionate with tetrahydrofuran,,4-dioxane and anisole as compared to Jouyban Acree model. However for butyl propionate + butyl vinyl ether the σ(%) values obtained by Jouyban Acree model are very low as compared to Vandeal Vangeel relation. Finally it may be concluded that the Vandeal-Vangeel model despite of having no interaction parameters has predicted the speeds of sound of the studied binary mixtures more satisfactorily as compared to Jouyban Acree model. 0.5 (7) 0.5 00( uexp u cal ) (%) (8) n k u exp Conclusions Density, viscosity and speed of sound for the binary mixtures of butyl propionate with tetrahydrofuran,,4- dioxane, anisole and butyl vinyl ether have been determined at ( 303.5, 308.5 and 33.5 ) K over the entire range of composition. From the experimental data excess volume V E, deviation in viscosities η, deviation in speeds of sound u and deviation in isentropic compressibilities K S, were evaluated. These excess or deviation functions found to exhibit both positive and negative deviations. Further the speeds of sound data were correlated using Jouyban Acree and Vandeal-Vangeel models to determine their predictive abilities. It was concluded that Vandeal-Vangeel relation despite having no interaction parameters has predicted the speed of sound for the studied binary mixtures more satisfactorily as compared to Jouyban Acree model. Acknowledgement Financial support from University Grants Commission, New Delhi India through ajor Research Project ( No. 38-4/009 SR) to the corresponding author (VR) is gratefully acknowledged. The authors also sincerely acknowledge the Hon ble Editor and the reviewers for reviewing this paper. References Frenkel, J., Kinetic Theory of Liquids, Dover Publications Inc, New York, 955, 488. Green, H. S., The olecular Theory of Fluids, North Holland Publishing Co,Amsterdam, 95, 64. 3 Chandler. D., Ann. Rev. Phys. Chem. 978, 9, 44. Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 649
4 Rodriguez, A., Canosa, J., Dominguez, A., Tojo, J., J.Chem.Eng.Data., 003, 48, 46 5 Lopez, E. R., Logo, L., Comonas,. J. P., J. Chem. Thermodyn., 000, 3, 743. 6 Iloukhani, H., Rostami, Z., Afshari, N., J. Phys. Chem. Liq., 009, 47, 360. 7 Fernando, E., Ortega, J., Penco, E., Wisniak, J., Ind. Eng Chem. Res., 00, 49, 9548. 8 Lien, P. J., Wu, S. T., Lee,. J., Lin, H.. J. Chem. Eng. Data., 003, 48, 63 9 Patwari,. K., Bachu, R. K., Boodida, S., Nallani, S., J. Chem. Eng. Data., 009, 54, 069. 0 Sheu, Y. W., Tu, C. H., J. Chem. Eng. Data., 006, 57, 545. Rathnam,. V., Kavita, R. B., Reema, S. T., Kumar. S. S., Eur. Chem. Bull., 03, (7),434. Rathnam,. V., Sudhir,., Nandini,., J. ol. Liq., 03, 77, 9. 3 Rathnam,. V., Sudhir,., Kumar,. S. S., J. Serb. Chem. Soc, 0, 77(4), 507. 4 Rathnam,. V., Sharad,., Kirti, J., Kumar,. S. S., J. Sol. Chem. 0, 4, 475 5 Jouyban, A. A., Fathi, A. A., Jafari, K.., Acree, Jr., W. E., Indian J. Chem., 005, 44A, 553. 6 Jouyban, A., Jafari, K.., Vaez, G. Z., Fekari, Z., Acree Jr., W. E., Chem. Pharm. Bull., 005, 53, 59 7 Vadeal, W., Vangeel, E., Proc. of st Int. Conf. Calor. Thermodyn., Warsaw, 969, p. 556. 8 Redlich, O., Kister, A. J., Ind. Eng.Chem. 948, 40, 345. 9 Ali, A., Nain, A. K., Pramana J. Phys, 00, 58, 695. 0 Fort, R. J., oore,w. R., Trans. Faraday Soc., 966, 6,. Received: 9. 03. 03. Accepted: 3. 04. 03. Eur. Chem. Bull., 03, (9), 64-650 DOI: 0.768/ECB.03..64 650