By heating above 100 0C (at standard pressure) or by freezing below 0 0C.
When ice melts and becomes water, that is a phase change. Same when water boils and becomes steam (a gas) that is also a phase change.
This phase change is called evaporation.
Water changes from a liquid phase to a gaseous phase when it is boiled.
The change of state when water is evaporated is from liquid to gas. Evaporation is a phase transition from the liquid phase to the gas phase.
Frost is a phase change of a gas to a solid (deposition). Water vapor turns directly to ice.
The Phase Change is complete, e.g water melting from ice phase to liquid phase or water evaporating from liquid to gas. Save
If heat is released from water, the phase change that occurs is from gas (water vapor) to liquid (water). This is known as condensation.
Water condensing is a physical change. It is a change in state from the gaseous phase (water vapor) to the liquid phase (liquid water) without any change in the chemical composition of water molecules.
A change of phase; from gas phase (water vapors) to liquid phase; the phenomenon is called condensation.
A Phase Change.
A phase change.
The phase change of water (liquid) to ice (solid) is called solidification.