Evaporation or vaporization

Volatile liquid eontaminants ean be removed from PPE or equipment by evaporation followed by a water rinse. Evaporation of volatile liquids ean be enhaneed by using steam jets. With any evaporation or vaporization proeess, eare should be taken to prevent worker inhalation of vaporized ehemieals. And, of eourse, the physieal hazards of steam need to be taken into eonsideration along with proteetion needed to eontrol any splatter of liquid or debris. Regulations pertinent to air emissions must also be taken into eonsideration. 

Verdunstungs-gefdss, n. evaporating vessel evaporimeter. -geschwmdigkeit, /. rate of evaporation, -kalte, /. cold due to evaporation. -kiihlung, /. cooling by evaporation, -messer, m. evaporimeter. -verlust, m. loss by evaporation or vaporization, -warme, /. heat of vaporization, verdutzen, v.t. nonplus. 

The transition from the liquid to the gaseous state is called evaporation or vaporization. The reverse is referred to as condensation or, in terms of rainfall, precipitation. If heated to 100°C in a closed container at 1 atm pressure, the two phases of water will coexist in the equilibrium given in Eq. 2.4. 

Heat of Condensation is the reverse of Heat of Evaporation or Vaporization (See under Heat, Latent)... 

Inhalants contain chemicals that are volatile, meaning they evaporate or vaporize quickly. When someone inhales a concentrated amount of these vapors, the vapors affect his or her normal mental functioning. 

The larger the surface area of the spilled material that accumulates as a liquid pool, the more material can evaporate or vaporize per unit of time. 

Evaporation, or vaporization, is the process by which molecules on the surface of a liquid... 

Volatilization of a chemical compound is controlled by its vapor pressure, ambient pressures (which vary with depth), and the partial pressures of associated chemicals and dissolved gases in groundwater. Vapor pressure increases with temperature (see Fig. 24.9), and ebullition occurs when the sum of the partial pressures of the chemical compound, water, and associated dissolved gases exceeds hydrostatic plus capillary pressures (Amos et al., 2005). That is, for ebullition to occur, bubbles must form under sufficient vapor pressure to rise to the water table and then overcome the capillary pressures to enter the vadose zone. As a result, evaporation or vaporization may occur below the pure-component boUtng point. 

Thermal drying consists of two steps. Firstly, heat is supplied by conduction, convection, or radiation from outside the product, or is generated inside the product. This heat is used to evaporate or vaporize the moisture out of the product. Secondly, the product phase and the steam are separated as follows. Steam is removed from the product, and if necessary, condensed outside of the dryer. 

Attractive forces exist between molecules in the liquid state. Not all of these molecules, however, have the same kinetic energy. Molecules that have greater-than-average kinetic energy can overcome the attractive forces and break away from the surface of the liquid to become a gas (see Figure 13.2). Evaporation, or vaporization, is the escape of molecules from the liquid state to the gas or vapor state. 

Volatile va-l9-t9l, esp British - tll [F, fr. L volatilis, fr. volare to fly] (1605) adj. (1) The easily evaporated or vaporized components of any coating composition in contrast to the non-volatile components. (2) Easily evaporated or vaporized at temperatures below about 40° C low-boiling. 

Evaporation (or vaporization) The transformation of a liquid into a gas. The reverse process in which a gas changes into a liquid is called condensation. 

The energy required for the evaporation or vaporization must be withdrawn from the environment (soil, air, water). This means that, depending on the individual case, vastly different heat exchange processes should be taken into account. If the emission behavior of the released toxic substance is known as a function of time, then the dispersion equations (Equation (7-2)) must be solved numerically. 

The evaporation of liquids is a familiar process. Water in a container will soon disappear (evaporate) if the container is left uncovered. Evaporation, or vaporization, is an endothermic process that takes place as a result of molecules leaving the surface of a liquid. The rate of evaporation depends on the temperature of the liquid and the surface area from which the molecules can escape. Temperature is an important factor because it is related directly to the speed and kinetic energy of the molecules and hence to their abihty to break away from the attractive forces present at the liquid surface. 

In evaporation or vaporization, a substance is converted from its liquid state into its gaseous state. 

You introduce a few drops of water from a medicine dropper into the mercury column of a barometer (Figure 11.4A). Being less dense than mercury, the water rises in the tube to the top of the mercury, where it evaporates, or vaporizes. 

No liquid evaporation or vapor condensation along the catalytic bed. 

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