Thermodynamic properties of binary mixtures of tetrachloromethane+n-alcohol by application of the Dispersive Quasi Chemical Model

Data available from the literature on the excess Gibbs energy GE, activity coefficients at infinite dilution γi∞, excess enthalpy HE and vapor–liquid equilibria were analysed on the basis of DISQUAC model by taking in account the dispersive interaction parameters for CCℓ4 with non-polar groups (alkyl-CH3; –CH2–) and dispersive quasichemical (two contributions by pair of contact) interaction parameters for polar group (hydroxyl-OH) and non-polar groups (CCℓ4 or alkyl). The prediction concerning the change in HE and GE with temperature, composition and n-alcohol chain length and vapor–liquid equilibria are in good agreement with known experimental data. The regular change of the coefficients Csh, ℓ(m) (s=a (alkyl) or d (CCℓ4) and h=hydroxyl; ℓ=1, 2) with the n-alcohol chain length may help to predict the missing quantities with better accuracy. A comparison between the DISQUAC prediction with results of two models based on the associated solution theory is presented and discussed. Some systematic discrepancies between theory and experiment are found, in particular for H2E∞ and γ2∞.