What is evaporation Related: NCERT Solutions - Is Matter Around Us Pure, Science, Class 9

Question

What is evaporation Related:  NCERT Solutions - Is Matter Around Us Pure, Science, Class 9

Answer

Evaporation is the process of changing of water into vapors below its boiling point .It is a surface phenomenon. Hope it will help you!!!!

Answer

The process of liquid changing into vapour even below its boiling point is called as evaporation.

Answer

Evaporation: The process of a liquid changing into vapour (or gas) even its boiling point is called evaporation. The wet clothes dry due toevaporation of water present in them. Common salt is also recovered from sea-water by the process of evaporation.

Answer

Evaporation

Evaporation is the process through which a liquid changes into its gaseous state at a temperature below its boiling point. It occurs when the kinetic energy of the liquid molecules increases, causing them to escape from the liquid surface and enter the surrounding atmosphere as vapor.

Process of Evaporation

Evaporation involves several steps:

1. Vaporization: The process begins with the vaporization of the liquid molecules at the surface. The molecules gain enough energy to overcome the intermolecular forces holding them together and transform into the gaseous state.

2. Escape: Once the liquid molecules vaporize, they escape from the liquid surface into the surrounding space as vapor. This occurs because the gas molecules have higher kinetic energy than the liquid molecules.

3. Diffusion: The vaporized molecules then diffuse in the surrounding atmosphere, mixing with the air molecules. This leads to an increase in the concentration of the vapor in the air.

4. Condensation: When the vapor molecules come into contact with a cooler surface or air, they lose energy and condense back into the liquid state. This is the reverse process of evaporation.

Factors Affecting Evaporation

Several factors influence the rate of evaporation:

1. Temperature: Higher temperatures increase the kinetic energy of the liquid molecules, leading to more evaporation.

2. Surface Area: A larger surface area allows for more liquid molecules to be exposed to the air, increasing the rate of evaporation.

3. Humidity: Higher humidity levels reduce the rate of evaporation as the air already contains a significant amount of moisture.

4. Wind Speed: Increased wind speed results in faster evaporation as it removes the vapor molecules from the liquid surface, maintaining a concentration gradient.

Applications of Evaporation

Evaporation has various practical applications, including:

1. Drying: Wet clothes or surfaces dry through evaporation, as the liquid water on them evaporates into the air.

2. Cooling: The process of evaporation can cool down the surroundings. For example, when sweat evaporates from our skin, it cools us down.

3. Salt Production: Evaporation is utilized in the production of salt from seawater or brine solutions. The water is evaporated, leaving behind the salt crystals.

4. Distillation: Evaporation is the key process in distillation, where a mixture is heated to separate its components based on their different boiling points.

Overall, evaporation is a crucial process in nature and has numerous applications in our daily lives. It plays a significant role in the water cycle, weather patterns, and various industrial processes.

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