Transport properties of nonelectrolyte liquid mixtures .10. Limiting mutual diffusion coefficients of fluorinated benzenes in n-hexane

Mutual diffusion coefficients, D-12, have been measured for benzene, seven fluorinated benzenes, and octafluorotoluene diffusing in n-hexane at trace concentration in the temperature range 213.2-333.2 K by the chromatographic peak-broadening technique with an estimated accuracy of +/-2.5%. These results are compared with the predictions of rough hard-sphere theory (RHS). The results are reproducible to within +/-10% with the translational-rotational coupling Factor equal to the value for the solvent. The activation energy of diffusion E(D), computed from Arrhenius plots, is almost constant for these solutes.