Entropy of adsorption and related thermodynamic functions in an open isothermal system Edoardo Garrone, Françoise Rouquérol, Bice Fubini and Giuseppe Della Gatta J. Chim. Phys., 76 (1979) 528-532 Published online: 29 May 2017 DOI: 10.1051/jcp/1979760528