Condensation The process by which vapor

Condensation The process by which vapor molecules transform into a liquid. 

Concentration cell a gaivanic ceii in which both compartments contain the same components, but at different concentrations. (18.5) Condensation the process by which vapor moiecuies re-form a iiquid. (10.8)... 

When a liquid is placed in a closed container, the amount of liquid at first decreases but eventually becomes constant. The decrease occurs because there is an initial net transfer of molecules from the liquid to the vapor phase (Fig. 16.44). However, as the number of vapor molecules increases, so does the rate of return of these molecules to the liquid. The process by which vapor molecules re-form a liquid is called condensation. Eventually, enough vapor molecules are present above the liquid so that the rate of condensation equals the rate of evaporation (see Fig. 16.45). At this point no further net change occurs in the amount of liquid or vapor because the two opposite processes exactly balance each other the system is at equilibrium. Note that this system is highly dynamic on the molecular level—molecules are constantly escaping from and entering the liquid at a high rate. However, there is no net change, because the two opposite processes just balance each other. 

Condensation - The process by which water in air changes from a vapor to a liquid due to a change in temperature or pressure occurs when water vapor reaches its dew point (condensation point) also used to express the existence of liquid water on a surface. 

Distillation is the process by which two or more liquids, or a solution of liquids and solids, are separated as a result of differences in vapor pressure and boiling points through the evaporation and condensation of the mixture components above the boiling liquid mixture. 

It is well established that in non-arid regions, precipitation is the primary means by which contaminating aerosols are removed from the atmosphere. Many chemical, physical, and meteorological parameters affect the micro, meso, and synoptic scale processes through which precipitation transports radioactive aerosols from atmosphere to ground. These parameters include the radioactivity component of the natural aerosols, the processes by which water vapor condenses and grows to raindrops, and the incorporation of the radioactive aerosol into the precipitation. Thus, the prediction of specific deposition from fundamental considerations has proved to be difficult because of the many uncertainties yet prevalent in these processes. Many attempts have been made to evaluate the deposition of these aerosols by empirical studies. 

Condensation When a water vapor molecule loses energy, its velocity is reduced. The vapor molecule is more likely to interact and form a hydrogen bond when it collides with another water molecule. The formation of hydrogen bonds signals the change from the vapor phase to the liquid phase. Because liquids are more dense than vapors, the process by which a gas or a vapor becomes a liquid is called condensation. Condensation is the reverse of vaporization. When hydrogen bonds form in liquid water, energy is released. 

When you change the temperature and/or the pressure of a liquid, you get phase changes to occur. Vaporization, or boiling, is the process by which a liquid becomes a gas. The temperature and pressure at which a substance undergoes vaporization depend upon the intermolecular forces between its particles. When a substance such as gasoline evaporates at a relatively low temperature, it is an indication that the forces between its molecules are not as strong as those between water molecules. Vaporization takes place when the vapor pressure of the liquid is equal to the pressure of the atmosphere on its surface. Condensation is the process by which gas becomes a liquid. We see condensation form on the outside of a cold glass, as water vapor in the air turns into a liquid. 

When simple compound bodies which are either wholly or in part capable of assuming the aeriform state are subjected to heat, they or their most volatile constituents, upon reaching the required temperature, rise in the form of vapor. If these vapors, in their transit, are intercepted by a surface of a lower temperature, they condense and take a solid or liquid form, according to their nature. If the product is a solid, it is termed sublimate, and the process by which it is obtained is auhiimation. If it is liquid or gas. it takes the name of distillate, and the operation which yields it that of distillation. 

Reflux The process by which aU vapor evaporated or boiled from a vessel is condensed and returned to that vessel. 

Some liquid chemical substances, such as rubbing alcohol, have an odor that is very easily detected. This is because some molecules at the upper surface of the liquid have enough energy to overcome the attraction of neighboring molecules, leave the liquid phase, and evaporate. A phase is any part of a system that has uniform composition and properties. In a closed botde of rubbing alcohol, gas molecules under the cap strike the Hquid surface and reenter the Uquid phase through condensation. Condensation is the process by which a gas changes to a liquid. A gas in contact with its Uquid or soUd phase is often caUed a vapor. 

Dephlegmation, or partial condensation, refers to the process in which a vapor stream is cooled to a desired temperature such that a portion of the less volatile components of the stream is removed from the vapor by condensation. 

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