The adsorption of phenol, cyclohexanol, and n-hexanol from their dilute binary aqueous solutions onto graphitized carbon black (gcb) was investigated at 308.15 K. The adsorption excess isotherms were determined by flow frontal analysis solid/liquid (S/L) chromatography and also by the classical immersion method. The enthalpies of displacement of water by the C-6-ols were measured by now sorption microcalorimetry. A general thermodynamic treatment was developed for the adsorption at the S/L interface from dilute solutions, with further specifications to make the proposed equations operational for the analysis of experimental data. A combination of thermal data with adsorption data gave access to the monomolecular adsorption capacities and the molar surface areas of the C-6-ols adsorbed on gcb. The adsorption becomes polymolecular as the consolute phase boundary is approached. The net enthalpies of adsorption, in both monomolecular and multilayer regimes, were determined by subtracting a bulk correction term, related to the heats of solution at infinite dilution, from the total enthalpies of displacement.