A study has been made of the adsorption isotherms of n-atiphatic alcohols (methanol, ethanol, 1-propanol, and n-butanol designated C-1, C-2, C-3, and C-4, respectively) on parent and metal-doped gamma-alumina samples in the temperature range 273-313K as a function of temperature and coverage, using CAHN 1000 electrobalance. It is noted from the data that at a given relative pressure, the adsorbed amount for the sample treated at the same temperature decreases in the order C-4 < C-3 < C-2 < C-1. From the adsorption data, thermodynamic parameters such as isosteric heat of adsorption (q(st)), free energy (&UDelta;G(0)), differential enthalpy (&UDelta;H), and molar entropy (&UDelta;S-0) of adsorption have been calculated as a function of temperature and coverage. The values of q(st) are found to be higher for mtal-doped alumina which may be due to the coordination of n-aliphatic alcohols to metal vacancies present on the surface of alumina. It has been observed that at a given relative pressure, the enthalpy of adsorption for n-aliphatic alcohols (C-1-C-4) treated at the same temperature decreases in the order C-1 < C-2 < C-3 < C-4. The values of DeltaH are higher for metal-doped alumina than parent alumina, which indicate that strong adsorbate-adsorbent interaction is found after impregnation. It has also been noted that the values of DeltaG(0) for (C-1-C-4) are negative showing that the adsorption processes are spontaneous. These values decrease with increase in temperature indicating that alumina samples have higher adsorption affinity for (C-1-C-4) at low temperature. The low values of entropy (DeltaS(0)) indicate more constraint on the mobility of adsorbate molecules.