Evaporation describes the process of a liquid changing to a gas. Usually, the surface parts of a pool of liquid vaporize into a vapor or gas first. Evaporation occurs in both cold and warm liquids.Continue Reading
Warmer liquids evaporate quicker than cooler liquids. This is due to the fact that adding more energy to a liquid causes some of the molecules to become energized enough to release the liquid into the air. An example of this is when a pot of water boils on a stove. Once the water gets hot enough, liquid water converts and changes phases into a gas; if enough of the water is evaporating, it becomes visible as steam. Cold water can also evaporate.
Molecules in a liquid actually have different levels of energy. When this happens, some of the water converts into gas; that is why wind can increase evaporation rates. Evaporation also removes heat from a system, which is why when water evaporates on someone’s skin, they then feel cooler.
Evaporation is the mechanism that drives the water cycle. When water evaporates from the oceans, it rises into the atmosphere and eventually falls again as rain, which is then fresh water since the evaporating water loses all of the salt from the oceans.Learn more about Solutions & Mixtures
Some processes used to separate the components of mixtures are distillation, filtration, evaporation, chromatography and extraction. All of these processes rely on differences in the physical properties of the components to accomplish the separation.Full Answer >
High quality distilled water is not a mixture because the distillation process involves the removal of impurities from water via evaporation; however, distilled water from toxic sources, or that has been made with dirty equipment, may still contain impurities. This low quality distilled water is considered a mixture.Full Answer >
There are six ways to separate mixtures including sedimentation, decantation, filtration, evaporation, crystallization and distillation. Mixtures are made up of both solids and liquids.Full Answer >
The process of a gas changing to a liquid is called condensation, and for condensation to take place, the environment has to reach maximum vapor pressure, generally through a lowering of temperature in the case of the water cycle. Because pressure varies inversely with temperature, as temperature decreases, pressure goes up, causing the gas molecules to move with progressively less kinetic energy. Eventually, liquid vapor and droplets form, and the gas begins to condense.Full Answer >