phase transition temperature

The phase transition temperature is the specific temperature at which a substance changes from one state of matter to another—such as from solid to liquid (melting), liquid to gas (boiling), or vice versa. At this temperature, the substance's internal structure or energy level shifts enough to cause the change. For example, water turns to steam at 100°C under standard pressure. These temperatures are characteristic for each material and are crucial in scientific and industrial processes, as they indicate the points where substances undergo significant physical transformations.