Final answer:
Vaporization is the process of converting a liquid to a gas, while condensation is the process of converting a gas to a liquid. During condensation, heat is released.
Step-by-step explanation:
Vaporization is the process in which a liquid is converted to a gas. It occurs when liquid molecules absorb enough energy to overcome intermolecular forces and enter the gas phase. The reverse process, in which a gas is converted to a liquid, is called condensation. During condensation, a gas releases heat equal to the heat of vaporization.