Evaporation is a phase transition process in which a substance changes its state from liquid to vapor. It can take place in two ways, ie by evaporation and boiling. The evaporation process involves a phase transition to this
transition process in which a substance changes its state from liquid to vapor. It can take place in two ways, ie by evaporation and boiling. The evaporation process involves a phase transition at a temperature below the boiling point. On the other hand, the boiling of the substance takes place at the boiling point. Which can vary depending on the change in ambient pressure. The difference between boiling and evaporation
The water boils at 100 ° C, and the temperature does not rise even if heat is constantly supplied to it. The difference between boiling and evaporation, In contrast, the rate of evaporation depends on the surface, in the sense that the larger the surface, the faster the process will be. Let’s take a look at the article below that simplifies the difference between boiling and evaporating.
|Basis for comparison||Boiling||Evaporation|
|Meaning||Boiling involves the process of evaporation that turns a liquid into a gas when heated continuously.||Evaporation is a natural process, in which a liquid changes its shape into a gas due to an increase in temperature or pressure.|
|Required temperature||It occurs only at the boiling point.||It occurs at any temperature.|
|Bubbles||It creates bubbles||It does not create bubbles.|
|Energy||An energy source is needed.||Energy is supplied by the environment.|
|Fluid temperature||It remains constant||It reduces|
Definition of boiling
Boiling is a physical change and a type of rapid evaporation in which a liquid turns into steam when it is constantly heated at such a temperature that the vapor pressure of the liquid is equal to the external pressure exerted by the environment.
The temperature at which boiling begins is known as the boiling point. It depends on the pressure exerted on the liquid, ie. The higher the pressure, the higher the boiling point. In the process of boiling, when the molecules of the substance are so widespread that it can change its state, bubbles form and boiling begins.
In this process, as we heat the liquid, the vapor pressure rises until it is equal to atmospheric pressure. After that, bubbles will form in the liquid, which will move to the surface and burst, which will result in the release of gas. Even if we add more heat to the liquid, the boiling temperature will be the same.
Definition of evaporation
The process in which an element or compound is converted from a liquid to a gaseous state due to an increase in temperature and/or pressure is known as evaporation. The process can be used to separate a solid dissolved in a liquid, such as a salt dissolved in water. It is a superficial phenomenon, ie. It occurs from the surface of the liquid in the vapor.
Thermal energy is the basic requirement for evaporation, ie. To separate the bonds that water molecules hold together. In this way, it helps the water to evaporate slowly, at freezing points.
Evaporation largely depends on the temperature and amount of water present in the water body, ie. The higher the temperature and the more water, the higher the evaporation rate will be. The process can take place in both natural and artificial environments.
Key differences between boiling and evaporation
The points below are noteworthy because they explain the difference between boiling and evaporating:
- Boiling refers to the process of evaporation, whereby the liquid state turns into a gaseous state at a certain boiling point. In contrast, evaporation is defined as a natural process in which an increase in temperature and/or pressure turns a liquid into a gas.
- Boiling is a mass phenomenon. In the sense that it occurs in the whole liquid. In contrast, evaporation is a surface phenomenon that occurs only on the surface of a liquid.
- Boiling of liquids occurs only at the boiling point of that liquid, ie. It takes place only at a certain temperature. Conversely, the evaporation process can occur at any temperature.
- When boiling, bubbles form in the liquid. And then they move upwards and burst into gas until the bubbles form in the process of evaporation.
- While the energy source needs in the boiling process. In evaporation, the energy is provided by the environment.
- In boiling, the temperature of the liquid remains the same. While in the case of evaporation, the temperature of the liquid tends to decrease.
To summarize, boiling is a faster process compared to evaporation. Because the molecules of the liquid boil move faster than in the process of evaporation. While boiling produces heat and does not cause the liquid to cool. Evaporation leads to the cooling of the liquid.
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