Question
Download Solution PDFWhen the state is being changed from gas to liquid through the process of condensation, the temperature?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- Condensation is defined as the removal of heat from a system in such a manner that vapour (gas) is converted into liquid.
- It is a phase change process, hence latent heat transfer takes place and the temperature of the system remains constant during this process.
Example:
We have seen water droplets on the outside of a glass filled with a chilled cold drink on a humid summer day. This is because of condensation. As the hot moist air comes in contact with the cold surface of the glass, the water vapour (gas) in the air loses heat to the environment and it transforms into a liquid.
Additional Information
Types of Condensation
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Dropwise condensation |
It occurs when condensate liquid collects in the form of a number of droplets of varying diameters on the condensing surface without forming a continuous film and wetting the solid cooling surface. |
|
Film condensation |
The condensate wets the surface and forms a liquid film on the surface that slides down under the influence of gravity. Film condensation results in low heat transfer rates as the film of condensate impedes the heat transfer. |
|
Dew Condensation |
It takes place when the moist air comes in contact with some colder object and it may also take place when the temperature is close to the dew point. |
|
Cloud condensation |
It is the condensation of the water vapour in free air. Clouds are caused by the adiabatic cooling of air below its dew point. |
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