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Item Thermodynamics of Miscible Liquid Mixtures of Carbon Tetrachloride, n-Octanol and Water at 20°C(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (2), 1977) Platford, Robert F.Isopiestic measurements, using two independent sets of standards, have been combined with literature partition coefficient datajand have been used to calculate the activity coefficients of both components in the carbon tetrachloride + octanol system at 20'C. The presence of water in the system did not change the behaviour measured and it was concluded that partition coefficients can provide a reliable check on activity data, and vice versa.Item Complex-formation between Carbon Tetrachloride and Alkyl-substituted Benzenes(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (3), 1973) Ahmed, AkhlaqMeasurements of the enthalpies of mixing are presented for equimolar mixtures of carbon tetrachloride with ethylbenzene, cumene, and t-butylbenzene at temperature between 288.00 and 352.96 K. Enthalpies of mixing are also presented for carbon tetrachloride and ethylbenzene over a wide range of composition at 337.97 K at which point the enthalpy of mixing changes sign for an equimolar mixture. A double maximum is obtained in the curve of enthalpy of mixing against the mole fraction of carbon tetrachloride. The results are understood in terms of a simple theory of complex-formation.Item Vapour-Liquid Equilibrium and Excess Free Energies for Benzene+Dioxan and Carbon Tetrachloride+Dioxan Systems(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (6), 1972) Deshpande, D. D.; Oswal, S. L.This paper deals with the isothermal total vapour pressure measurements on the systems benzene + dioxan and carbon tetrachloride + dioxan in the temperature range of 22-40 'C and over the whole composition range. The activity coefficients and the excess Gibbs free energies arc evaluated at 25, 30 and 40'C. For both the systems the excess entropies arc negative, suggesting an ordering in the solution due to a solute-solvent specific interaction. The excess free energies of complexing arc calculated on the basis of an ideal associated solution model with species A, B, AB and AB2 in mutual equilibrium and using for reference, the excess free energies of the system cyclohexane 4- dioxan. The calculated excess free energies agree with the observed results.Item Pressure and Temperature Dependence of the Self-diffusion of Carbon Tetrachloride(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (10), 1972) McCool, M. A.; Woolf, L. A.A modified diaphragm cell method 1 has been used to measure the self-diffusion coefficient of carbon tetrachloride at 283, 298, 313 and 328 K over the pressure ranges 1-769, 1-1216, 1-1469 and 1-1475 bar, respectively. These results arc compared with less extensive data from other methods and used with data reported elsewhere for benzene 2 and cyclohexane 3 to test some current theories of transport. In a test of the Stokes-Einstein relation best agreement between theory and experiment was obtained for the pseudo-spherical molecules of carbon tetrachloride for which constancy of (Dtj/T) is maintained over the full range of temperature and pressure. A comparison of the present results with literature values calculated from molecular dynamics of hard spheres shows that the density dependence is not the same and the two cannot be reconciled by a temperature dependent hard sphere diameter. Internal pressures calculated from the data are not dependent on a model of the liquid and are in reasonable agreement with directly determined values.