Heat
The energy needed to change a substance from a liquid to a gas is called the enthalpy (or heat) of vaporization.
endothermic
Usually heat is needed. but this can happen through osmosis as well.
The energy needed to go from a liquid to a gas is referred to as heat of vaporization.
Thermal Energy
The change from a liquid to a gas is evaporation.
The process by which radiant energy from the sun causes a liquid to change into a gas is called evaporation. When sunlight shines on a liquid, it provides the energy needed to break the bonds holding the liquid molecules together, allowing them to escape into the air as gas.
The change of a liquid to a gas is Vaporization. Not to be confused with "Evaporation".
The heat energy needed to change a liquid to gas while the temperature stays the same is called the heat of vaporization. This energy is used to overcome the intermolecular forces holding the liquid molecules together and convert them into a gas. It is a phase change process that occurs at the boiling point of the substance.
thermal energy is needed to do that job. as opposed to mechanical potential or chemical energies.
A change of state from a gas to a liquid is called condensation.
A liquid can change to a gas, by heating up and evaporating into the air.