2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5279The entropy S of any mass M can be interpreted as a linear relation with mass, S of order kM/mg an extensive property with mg the mass of the quantum of gravity. One can extend this relation to black holes and then we get a different result, as compared with the "standard" relation S of order k/hc GM^2, which is quadratic in the mass. We discuss both approaches and apply it to cosmology.Presented at the Spanish ERE2002 Meeting; 4 pagesAstrophysicstext