2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85972A one dimensional motion of the Bethe-Johnson gas is studied in a context of Landau's hydrodynamical model of a nucleus-nucleon collision. The expressions for the entropy change, representing a generalization of the previously known results, are found. It is shown that these expressions strongly depend on an equation of state for the baryonic matter.24 pages, 5 figuresFluid Dynamicstext