Abstract
Densities and relative permittivities at a frequency of 30 kHz for the binary mixtures of 1-alkanols, CnH2n+1OH for n = 1 to 10, + dodecane were measured for the mole fraction range of 1-alkanol between 0 and 0.1 at a temperature of 298.15 K. By using Debye and Frohlich equations, the apparent dipole moments (μ) of 1-alkanols were calculated, and the limiting values (μ0) were determined by extrapolating to infinite dilution. The value of μ0 decreased with increasing hydrocarbon length of the 1-alkanol. The present results were compared with our previous measurements in cyclohexane and heptane. Methanol had the same μ0 value irrespective of solvent, while μ0 for 1-alkanols with n ≥ 2 showed a lower value in dodecane than those found in cyclohexane and heptane. The excess partial molar volumes of 1-alkanols at infinite dilution decreased with increasing n.
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