2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83839It has been supposed that the law of conservation of energy in chemical reactions has the following form: dU=dQ-PdV+SUM Earlier the author has shown that for the biggest part of reactions it must have the following form: dU=dQ+PdV+SUM In the present paper this result is confirmed by other experiments.e-mail me istepanov@email.com, 5 pages, correction is made in the footnoteGeneral PhysicsChemical Physicstext