Thermal energy added or removed from a substance that changes the state of the substance is called
Answer Details
The thermal energy that is added or removed from a substance causing it to change its physical state (such as from solid to liquid or from liquid to gas) is called "latent heat." This term refers to the fact that the heat is "hidden" or "latent" within the substance and does not cause a temperature change, but instead is used to change the molecular arrangement of the substance. For example, when ice is melted into water, the heat added is used to break the bonds between the ice molecules and allow them to move more freely, rather than increasing the temperature of the water. Latent heat is an important concept in thermodynamics and is used to explain many natural phenomena, such as the formation of clouds, the melting of glaciers, and the evaporation of water.