Ramu took a glass of cold water from the refrigerator and placed it on...
Water vapour in the air gets condensed to form water droplets.
View all questions of this test
Ramu took a glass of cold water from the refrigerator and placed it on...
Explanation:
When Ramu took a glass of cold water from the refrigerator and placed it on a table, he observed water drops on the outer surface of the glass. The formation of these water droplets can be explained by the process of condensation.
Condensation:
Condensation is the process by which a gas or vapor changes into a liquid state. It occurs when the temperature of the gas or vapor is lowered, causing the particles to come closer together and form liquid droplets. In this case, the water vapour present in the air around the glass gets condensed into liquid water droplets on the outer surface of the glass.
Reasons for Water Droplets Formation:
The following reasons explain why water droplets formed on the outer surface of the glass:
1. Temperature Difference: When Ramu took a glass of cold water from the refrigerator, there was a significant difference in temperature between the cold water and the surrounding air. The cold glass surface cools down the air around it.
2. Saturation: The air contains water vapour in the form of invisible gas. The amount of water vapor that air can hold depends on its temperature. When the air is saturated with water vapor and its temperature decreases, it reaches a point called the dew point. At this point, the air can no longer hold all the water vapor, and condensation occurs.
3. Cooling Effect: The cold glass surface acts as a cooling agent for the air around it. As the air comes into contact with the cold surface of the glass, it cools down. This cooling effect lowers the temperature of the air, causing the water vapor present in the air to condense into liquid water droplets.
4. Dew Formation: The process of condensation on the surface of objects is commonly known as dew formation. It is the same process that causes dew to form on grass or leaves during cool nights.
Conclusion:
In conclusion, the water droplets formed on the outer surface of the glass because of the condensation process. The cold glass surface cooled down the air around it, causing the water vapor in the air to condense into liquid water droplets. This phenomenon is commonly observed when cold objects are placed in a humid environment.
To make sure you are not studying endlessly, EduRev has designed Class 3 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 3.