Isobaric vapor-liquid equilibrium measurements are reported for the binary mixtures of Mesitylene + 1-Heptanol and Mesitylene + 1-Octanol at 97.3 kPa. The measurements have been performed using a vapor recirculating type (modified Othmer's) equilibrium still. Both the mixtures show positive deviation from ideality. The Mesitylene + 1-Heptanol mixture forms an azeotrope whereas Mesitylene + 1- Octanol form a non – azeotropic mixture. The activity coefficients have been calculated taking into consideration the vapor phase nonideality. The data satisfy the thermodynamic consistency tests of Herington, and Hirata. The activity coefficients have been satisfactorily correlated by means of the Margules, Redlich-Kister, Wilson, Black, and NRTL equations. The activity coefficient values have also been obtained by UNIFAC method.<\/p>\r\n","references":"[1] B. N. Raju, R. Ranganathan, and M. N. Rao, \"Vapor-liquid equilibrium\r\nstill for partially miscible systems,\" Indian Chemical Engineer, 1965,\r\nvol. 7, pp. T33-T37.\r\n[2] B. Kumar, and K. S. N. Raju, \"Vapor-liquid equilibrium data for the\r\nsystems 2-methoxyethanol-ethylbenzene, 2-methoxyethanol-p-xylene,\r\nand 2-ethoxyethanol-p-xylene,\" Journal of Chemical and Engineering\r\nData, 1977, vol. 22, pp. 134-137.\r\n[3] J. A. Riddick, W. B. Bunger, and T. K. Sakano, Organic Solvents:\r\nPhysical Properties and Methods of Purification. 4th ed. Wiley-\r\nInterscience: New York, 1986.\r\n[4] B. K. Sood, O. P. Bagga, and K. S. N. Raju, \"Vapor-liquid equilibrium\r\ndata for systems ethylbenzene-anisole and p-xylene-anisole,\" Journal of\r\nChemical and Engineering Data, 1972, vol. 17, pp. 435-438.\r\n[5] H. C. Van Ness, and M. M. Abbott, Classical Thermodynamics of Nonelectrolyte\r\nSolutions. McGraw-Hill: New York, 1982.\r\n[6] E. W. Lyckman, E. C. Eckert, and J. M. Prausnitz, \"Generalized Liquid\r\nVolumes and Solubility Parameters for Regular Solution\r\nApplication\", Chemical Engineering Science, 1965, vol. 20, pp. 703-\r\n706.\r\n[7] C. Tsonopoulos, \"An empirical correlation of second virial coefficients,\"\r\nAIChE Journal, 1974, vol. 20, pp. 263-272.\r\n[8] R. C. Reid, J. M. Prausnitz, and B. E. Poling, The Properties of Gases &\r\nLiquids. 4th ed. McGraw-Hill: New York, 1987.\r\n[9] J. A. Riddick, W. B. Bunger, and T. K. Sakano, Organic Solvents:\r\nPhysical Properties and Methods of Purification. 3rd ed. Wiley-\r\nInterscience: New York, 1970.\r\n[10] T. Boublik, V. Fried, and E. Hala, The Vapor Pressures of Pure\r\nSubstances. Elsevier: New York, 1975.\r\n[11] E. F. G. Herington, \"Tests for the consistency of experimental isobaric\r\nvapor-liquid equilibrium data,\" Journal of Institute of Petroleum, 1951,\r\nvol. 37, pp. 457-470.\r\n[12] H. Renon, and J. M. Prausnitz, \"Local compositions in thermodynamic\r\nexcess functions for liquid mixtures,\" AIChE Journal, 1968, vol. 14, pp.\r\n135-144.\r\n[13] V. K. Rattan, S. Kapoor, and S. Singh, \"Isobaric vapor-liquid equilibria\r\nof 1-butanol- p-xylene system,\" International Journal of\r\nThermophysics, 2006, vol. 27, pp. 85 -91.\r\n[14] J. Gmehling, J. Lohmann, and R. Wittig, \"Vapor-liquid equilibria by\r\nUNIFAC Group Contribution. 6. Revision and extension,\" Industrial\r\nEngineering Chemistry Research, 2003, vol. 42, pp.183-188.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 27, 2009"}