* Melting point: The temperature at which a solid transforms into a liquid.
* Boiling point: The temperature at which a liquid transforms into a gas.
* Sublimation point: The temperature at which a solid transforms directly into a gas, skipping the liquid phase.
Kinetic Energy and Transformations
At higher temperatures, particles in a substance have more kinetic energy, which means they are moving faster and vibrating more vigorously. This increased energy can overcome the forces holding the particles together in their current state, leading to a change in state:
* Solid to Liquid: The particles in a solid are tightly packed and have limited movement. As temperature increases, the particles vibrate more vigorously, eventually overcoming the attractive forces holding them in a fixed lattice. This allows them to move more freely, resulting in a liquid state.
* Liquid to Gas: The particles in a liquid are still close together but have more freedom of movement. As temperature increases, particles gain enough kinetic energy to escape the attractive forces holding them in the liquid state. They move further apart and become a gas.
Important Note: The specific transition temperature depends on the substance itself and the surrounding pressure.
