Final answer:
When a liquid is vaporized, a moderate amount of energy is gained in the process.
Step-by-step explanation:
The amount of energy gained when a liquid is vaporized (changed into a gas) is typically a moderate amount of energy.
Vaporization requires heat transfer to the liquid from the surroundings, which releases energy by the surroundings. This energy is exactly the same as that required to make the phase change in the other direction, from liquid to vapor.
The amount of energy required to convert a liquid to a gas is called the enthalpy of vaporization (or heat of vaporization).