BOILINGEVAPORATIONA process in which a substance changes itsA process inwhich a substance changes its statestate from the liquid state to thefrom the liquid state to the gaseous stategaseous statewithout boilingFastSlowBubbles are formedNo bubbles formedOccurs throughout the liquidTakes place only from the exposed surface of the liquidOccurs at a definite temperature−Boiling pointOccurs at all temperatureSource of energy neededEnergy supplied by surroundings