Mohammad Ghashghaee - Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute,P.O. Box 17941-111, Tehran, Iran.

This short commentary reports on frequent improper deductions in macroscopic treatment of data from adsorption processes from a fundamental thermodynamics point of view. The common shortcomings relate to the calculation of adsorption equilibrium constant along with the way the judgment is made about the process spontaneity. The author hopes these frequent flaws are set back in future with our careful consideration of the basic principles

Adsorption, Thermodynamics, Gibbs free energy change, Equilibrium, Spontaneity