Condensation is generally exothermic in that the material doing the condensing will be giving up thermal energy to do so. Fusion vaporization and sublimation are endothermic processes whereas freezing condensation and deposition are exothermic processes. Pin By Beatrix Beem On Chemistry Chemistry Lessons Teaching Chemistry Chemistry Education And giving up heat energy is. . Explosions are some of the most violent exothermal reactions. Condensation has particles of a gas slow down to form intermolecular forces and transition into a liquid phase. Why is condensation endothermic or exothermic. Vaporization like melting requires energy to be put in for the molecules to change state from liquid to gas. 21 posts Page 1 of 1. Exothermic means a process that is accompanied by the release of heat energy so the quote you gave that water vapor loses energy in the form of heat as it condenses demonstrates that. For ex...