What are the determinants of the speed of evaporation and what are the decisions?

Temperature, Humidity, Liquid surface area, Air flow above liquid.

It is related to temperature and air humidity.

Title: evaporation Pinyin: zhēng fā

Basic explanation. evaporate] is a phenomenon in which liquid transpiration volatilizes into water vapor.

Occurrence conditions. Evaporation can occur at any temperature. The evaporation process absorbs heat and evaporates to cool.

Influencing factors. Factors that affect how fast or slow evaporation is: temperature, humidity, surface area of the liquid, air flow on the surface of the liquid, etc.

The main factors influencing evaporation.

One is related to the temperature. The higher the temperature, the faster the evaporation. No matter what the temperature, there are always some molecules in the liquid with a high velocity that can fly out of the liquid surface and become vapor molecules, so the liquid can evaporate at any temperature.

If the temperature of the liquid increases, the average kinetic energy of the molecules increases, and the number of molecules flying out of the liquid surface increases, so the higher the temperature of the liquid, the faster the evaporation; The second is related to the size of the liquid surface area. If the surface area of the liquid increases, the number of molecules near the surface of the liquid increases, so that in the same time, the number of molecules flying out of the liquid surface increases, so the liquid surface area increases, and the evaporation accelerates;

The third is related to air flow. When vapor molecules flying into the air collide with air molecules or other vapor molecules, they may be bumped back into the liquid. If the liquid surface air flows quickly and is well ventilated, the less chance the molecules will return to the liquid, the faster the evaporation.

Different liquids with the same conditions will evaporate at different speeds. This is due to the difference in the magnitude of cohesion between the molecules of the liquid. For example, the cohesion between mercury molecules is so great that only a very small number of molecules with sufficient kinetic energy can escape from the liquid surface, and this liquid evaporates very slowly.

Other liquids, such as ether, have very little cohesion between molecules, and a large number of molecules can escape from the liquid surface, so they evaporate quickly. In addition, liquid evaporation not only absorbs heat, but also cools the surrounding objects. When the liquid evaporates, the molecules that run out of the liquid work work on them by overcoming the gravitational pull of the molecules in the surface layer of the liquid.

These molecules can do work because they have enough kinetic energy. The molecule with the higher velocity flies out, and the average kinetic energy of the molecule left behind becomes smaller, so its temperature must be lowered. In this case, it draws heat from the surrounding objects through heat transfer, thus cooling the surrounding objects.

The temperature is high or low, the speed of the air flow on the surface, and the size of the surface area.

Therefore, it is necessary to dry clothes in the sun (to increase the temperature) (to increase the surface area) and in a ventilated place (to increase the speed of surface air flow).

Contact surface with air. Temperature. The temperature polymer moves quickly.

First, it is related to the temperature. The higher the temperature, the faster the evaporation.

Second, it is related to the size of the liquid surface area. As the liquid surface area increases, evaporation accelerates.

Third, it is related to air flow. The faster the liquid air flows and the better the ventilation, the faster the evaporation.

Fourth, it is related to air humidity, high air humidity, slow evaporation, low air humidity, fast evaporation.

The speed at which water evaporates depends on three factors:

1) The higher the temperature of the water, the faster it evaporates; (2) The larger the surface area of water, the faster it evaporates; (3) The faster the air flows above the water surface, the faster it evaporates.

What has nothing to do with the speed of water evaporation is the volume of water, which is a phase transition process from a liquid state to a gaseous state, and a phase transition process in which water is converted from a liquid or solid state to a gaseous state. Evaporation and boiling are both vaporization phenomena and are two different ways of vaporization.

Evaporation is the process of vaporization that occurs on the surface of a liquid, and boiling is a violent vaporization phenomenon that occurs both inside and on the surface of a liquid. The steamer of the solution usually refers to the vaporization of a part of the solvent in the solution by heating to improve the non-volatility of the solution.

The concentration (concentration) of a component or the process by which the solute is crystallized out of solution. In general, the higher the temperature, the larger the exposed area of the liquid level, and the faster the evaporation rate. The lower the pressure on the surface of the solution, the faster the evaporation rate of the liquid pin.