the change from liquid to vapor. Evaporation of sweat is the body's natural cooling system, and it's impeded by clothes. But the proper layering system, including wicking underwear and breathable outerwear, allows for evaporation. Result: You stay dry.
Evaporation can be defined as the process by which liquid water is converted into a gaseous state. Evaporation can only occur when water is available. It also requires that the humidity of the atmosphere be less than the evaporating surface (at 100 % relative humidity there is no more evaporation). The evaporation process requires large amounts of energy. For example, the evaporation of one gram of water at a temperature of 100° Celsius requires 540 calories of heat energy (600 calories at 0° Celsius).
common technique used to deposit thin film materials; material to be deposited is heated in vacuum, 10-6 Torr - 10-7 Torr range, until it melts and starts evaporating; vapor of material is condensing on the cooler substrate exposed to the vapor; common technique in thin film metal deposition; not suitable for high melting point materials; one of the PVD (Physical Vapor Deposition) methods of thin film formation.
Keep this one in mind when you're away for a while. When your water is warm, and the air is cold, the water evaporates faster. I was surprised to have to add a lot of water to my pond this Fall as each morning, I would note a fog bank over my pond.
The conversion of liquid water to water vapor. It occurs on the surface of water bodies such as lakes and rivers and immediately after precipitation events in small depressions and other storage areas.
The process of turning water to vapour (from a liquid to a gas). At 100ÂºC, the boiling point, all water will rapidly be turned to vapour, because the energy supplied to heat the water is enough to break apart all the molecular bonds. At temperatures between 0ÂºC and 100ÂºC, only some of the molecules in the water have enough energy to escape to the atmosphere and the rate at which water is converted to vapour is much slower. The rate of evaporation depends on temperature of the air (an increase of 10ÂºC will double the rate of evaporation) and the dryness or humidity of the air will (drier air has a greater "thirst" for water vapour than moist air). Evaporation is an important part of the water cycle.
the process by which water or other liquids change from liquids to a gas vapor; evaporation can return infiltrated water to the atmosphere from upper soil layers before it reaches groundwater or surface water, and occur from leaf surfaces (interception), water bodies (lakes, streams, wetlands, oceans), small puddled depressions in the landscape.
common method used to deposit thin film materials; material to be deposited is heated in vacuum (10-6 - 10-7 Torr range) until it melts and starts evaporating; this vapor condenses on a cooler substrate inside the evaporation chamber forming very smooth and uniform thin films; not suitable for high melting point materials; PVD method of thin film formation. learn more.
In meteorology , the change of liquid or ice to water vapour. The rate of evaporation is controlled by water and energy (mainly solar radiation) supplies and by the ability of the air to take up more water.
The transformation of liquid into a vapor, generally as a result of rise of temperature, is the opposite of condensation. Moisture in damp soil, such as in a crawl space, can evaporate into the air, raise the relative humidity in that space, and enter the building as a vapor.
moisture that is, sweat in the form of vapor, moving from skin to air. Evaporation is the body's natural cooling system, and it's impeded by clothes. But the proper layering system, including wicking underwear and breathable outerwear, allows for evaporation. Result: You stay dry.
the physical process by which a liquid changes to vapor Water is Earth's surface from the Earth's surface to the atmosphere through the evaporation of water or ice into water vapor, and through transpiration from plants.
The process by which a substance is converted from a liquid to a vapor. "Evaporative emissions" occur when a liquid fuel evaporates and fuel molecules escape into the atmosphere. A considerable amount of hydrocarbon pollution results from evaporative emissions that occur when gasoline leaks or spills, or when gasoline gets hot and evaporates from the fuel tank or engine.
Thermal separation process for concentration of liquids by vaporizing volatile components; in the Chempolis process used for direct recovery of cooking chemicals and concentration of dissolved material.
the physical process by which a liquid is transformed into a gaseous state. Wet clothes on the clothesline become dry because the sun's warmth evaporates the water in them; evaporation is also how water vapor moves from lakes and rivers up to the sky.
To convert or change into a vapor. To draw off in the form of vapor. To draw moisture from, as by heating, leaving only the dry solid portion. [Middle English evaporaten, from Latin vap re, vap : -, ex-, ex- + vapor, steam.
The process of a substance changing from a liquid form into a vapor. If a bowl of water is left out, it will eventually seem to disappear as the visible liquid changes into invisible water vapor. The evaporation of water is a vital link in the water cycle.
(Also called vaporization.) The physical process by which a liquid or solid is transformed to the gaseous state; the opposite of condensation. Evaporation is usually restricted in use to the change of water from liquid to gas, while sublimation is used for the change from solid to gas. According to the kinetic theory of gases, evaporation occurs when liquid molecules escape into the vapor phase as a result of the chance acquisition of above-average, outward-directed, translational velocities at a time when they happen to lie within about one mean free path below the effective liquid surface. It is conventionally stated that evaporation into a gas ceases when the gas reaches saturation. In reality, net evaporation does cease, but only because the numbers of molecules escaping from and returning to the liquid are equal, that is, evaporation is counteracted by condensation. Because the molecules that escape the condensed phase have above-average energies, those left behind have below-average energies, which is manifested by a decrease in temperature of the condensed phase (unless compensated for by energy transfer from the surroundings). See also evapotranspiration.
One of the three main types of distillation*, in which, under applied heat, the vapors of a liquid rise, generally within a container, such as an alembic*, and are then condensed by cooling. Alchemical: Often represented as vapors ascending from earth to heaven; a serpent eating its own tail; or, a flight of birds.
the physical process by which a liquid or solid substance is transformed to the gaseous state; the opposite of condensation; in meteorology, evaporation usually is restricted in use to the change of water from liquid to gas, while sublimation is used to the change from solid to gas as well as from gas to solid.
The process by which visible moisture droplets turn to invisible moisture vapour. This process, through the principles of latent heat production extracts heat from the surrounding area. This is why we get a chill when we come out of the see in the sun, as the water evaporates off our skin, the process cools the surrounding air next tour skin. This is also why exposed roots in an NFT system will go slightly brown with cell damage if the pump is off for too long or the channel is not humid enough, as the nutrient solution evaporates off the root zone.
Evaporation is the process whereby atoms or molecules in a liquid state gain sufficient energy to enter the gaseous state (the equivalent process in solids is known as sublimation). It is the opposite process of condensation. Evaporation is exclusively a surface phenomena and should not be confused with boiling.
Evaporation is a common method of thin film deposition. The source material is evaporated in a vacuum. The vacuum allows vapor particles to travel directly to the target object (substrate), where they condense back to a solid state.