2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/174832We establish an expression of the entropy-from-work theorem that is complementary to the one originally proposed in [P. Talkner, P. Hanggi and M. Morillo, arXiv:0707.2307]. In the original expression the final energy is fixed whereas in the present expression the initial energy is fixed.2 PagesStatistical Mechanicstext