“…The differential enthalpy or isosteric heat of sorption indicates the strength of water molecules adsorbed by solid particles (Azhar et al, 2021), as it reflects the energies of the water molecules bound at a certain hydration point. Several authors have proved that the point where integral entropy finds its minimum (∆S min ) could be assumed as the best water activity (a w ) for preserving food, and that occurs because the water-food bond is the strongest one (Acosta-Domínguez et al, 2021;Cano-Higuita et al, 2015;Escalona-García et al, 2016;Osorio-Tellez et al, 2021;Velázquez-Gutiérrez et al, 2021).…”