What Plateau in a heating curve?

In a heating curve, a plateau represents a phase change where the temperature remains constant while a substance transitions between states, such as melting (solid to liquid) or boiling (liquid to gas). During this time, the heat energy added is used to overcome intermolecular forces rather than increase temperature. For example, during the melting plateau, heat energy is used to break the bonds holding the solid structure together, while during the boiling plateau, it is used to separate molecules in the liquid phase. These plateaus are essential for understanding the energy changes during phase transitions.