When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between them increases. On constant vibration, intermolecular forces decrease and particles start moving away from each other and change to gas.
- The intermolecular forces between water molecules decrease when a liquid turns into a gaseous liquid or steam.
- Intermolecular forces are strongest in the solid state and weakest in the gaseous state for any given material.
Changing state of matters
- A change of state is a physical change in a matter.
- They are reversible changes and do not involve any changes in the chemical makeup of the matter.
- Melting, freezing, sublimation, deposition, condensation, and vaporization are all examples of state changes.
- Phase changes occur when a system’s temperature or pressure changes.
- The interaction between molecules increases as the temperature or pressure rises.
- Similarly, as the temperature drops, molecules and atoms find it easier to form a more rigid structure.
- When the liquid gets converted to gas at all the temperatures, it is known as evaporation.