Question:
............. is the example of evaporative refrigeration.
............. is the example of evaporative refrigeration.
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Evaporative cooling works best in hot, dry climates where the relative humidity of the air is low, maximizing the evaporation rate of water.
Updated On: Jul 10, 2026
- Household refrigerator
- Desert bag
- Air conditioner
- Water cooler
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Evaporative cooling is a physical phenomenon in which the sensible temperature of a system drops due to the latent heat absorbed when a liquid (typically water) evaporates into gas.
Step 2: Detailed Explanation:
1. A desert bag (canvas water bag) is made of a porous canvas material.
2. When filled with water, a small amount of water slowly seeps through the tiny pores of the canvas to the outer surface.
3. This seeping water evaporates from the outer surface into the dry ambient air.
4. The latent heat required for this evaporation is drawn from the bulk water inside the bag, which lowers the temperature of the remaining water.
5. Household refrigerators, air conditioners, and standard electrical water coolers operate on closed vapor compression refrigeration cycles utilizing artificial refrigerants and external mechanical work.
Step 3: Final Answer:
The desert bag is a classic, passive example of evaporative refrigeration.
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