Energy is absorbed when a liquid turns into a gas, and released when the reverse happens. Type of heat source will limit what you can do. A hot plate or other source may take some time to get it hot enough to work quickly. Note condensation of water. Rub alcohol on skin.
Liquid absorbs heat from skin as it changes into a gas.
Place two beakers of water on a hot plate. One with twice as much water as the other. Wet paper won't burn and water puts out fires because the water absorbs so much heat as it vaporizes that it cools the material. Evaporating sweat cools your body. Boiling point of liquids is higher if substances are dissolved such as antifreeze in your radiator.