Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

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 (i) of 1-alkanols were calculated, and the limiting values (i0) were determined by extrapolating to infinite dilution. The value of i0 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 i0 value irrespective of solvent, while i0 for 1-alkanols with n g 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.