Evaporation is a cooling process because when liquid turns to gas, it needs more energy, and so it has to take that energy from its surroundings. The energy is in the form of heat, and when the heat energy leaves with the evaporating liquid, the surroundings get cooler as a result. This has to do with the properties of the different states of matter.Know More
Gas molecules move much more quickly than liquid molecules (and particular solid ones). Motion requires kinetic energy, and the faster a molecule moves, the more kinetic energy it needs.
For many people, it helps to think about how perspiration works. The body releases sweat through the pores, but the sweating does not complete the job of cooling. The sweat evaporates, taking heat from the body with it. Inside the molecules, both solids and liquids have forces at work that hold the molecule together and connect it to other molecules. For a solid to become a liquid, and then for a liquid to become a gas, those attractive forces have to break. The source of the energy necessary to break those forces is excess heat in the system. So while evaporation does lead to cooling, it does not lead to a loss of energy. Instead, the energy simply converts from heat energy to kinetic energy for the gas molecules.Learn more about Atoms & Molecules
The water cycle is responsible for distributing water across the earth through evaporation, condensation and precipitation, a process that is vital for sustaining life on earth by providing water to plants, animals and humans. It is also the driving force behind the earth's climate. Clouds are formed through condensation, and temperature is regulated through evaporation and water vapor in the air.Full Answer >
Argon gas is used in fluorescent and incandescent light bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament.The use of argon in light bulbs prevents the evaporation of the tungsten filaments, which results in increased light bulb life.Full Answer >
The explosion created when soda and Mentos are combined occurs because of nucleation, a process in which the carbon dioxide in the soda attempts to latch onto the outside of the Mentos, creating a huge amount of pressure. This pressure forces the soda to explode out the top of the bottle.Full Answer >
The element silicon is created through a process where carbon and sand are heated to temperatures close to 3,992 degrees Fahrenheit. Silicon is also very abundant in the Earth's crust and is the seventh most plentiful element in the universe. Silicon was first discovered by a Swedish chemist named Jons Jacob Berzelius in 1894.Full Answer >