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Autori: Teodorescu M., Barhala A., Landauer O.
Editorial: ELDATA: Int. Electron. J. Phys.-Chem. Data, 3, p.101-108, 1997.
Isothermal P-x-y vapor-liquid equilibrium data are reported for 1,2-dichloroethane + pentan-3-one at 323.15, 333.15, 343.15, and 353.15 K and for 1,3-dichloropropane + pentan-3-one at 343.15, 353.15, 363.15, and 373.15 K. The data were correlated using the Redlich-Kister equation taking into account the vapor phase imperfection in terms of the 2nd virial coefficients. The calculated equimolar excess Gibbs energies at 343.15 K, are of the order of -194 J mol-1 for 1,2-dichloroethane + pentan-3-one and of -147 J mol-1 for 1,3-dichloropropane + pentan-3-one. The excess enthalpies, estimated from the temperature dependence of the excess Gibbs energies, are also negative, in agreement with direct calorimetric literature data. These results indicate relatively strong interactions between the Cl groups of the chloroalkanes and the CO group of the alkanone. The total effect decreases with decreasing surface fraction of Cl on the chloroalkane molecule.
Cuvinte cheie: vapour-liquid equilibria, pentan-3-one, 1,2-dichloroethane, 1,3-dichloropropane, experimental, correlation