Concept explainers
To explain: The concept of exhaled air appears to be white in winter.
Answer to Problem 27Q
The white cloud is seen due to the presence of moisture present in the air in the lungs.
Explanation of Solution
Introduction:
The appearance of the exhaled air is white due to the condensation of the water.
The air exhaled by the lungs out of the body is in form of water vapors in a higher amount. And the air inside the body in the lungs is warm. And the pressure of the water vapor in the lungs is quite high without soaking the air in the lungs hence condensation is not possible in that case. But the case of the winter is quite different. Because in winter the condensation of water is very small. So, the warm, water-laden exhaled cool air, the partial pressure of the water vapor is little high the saturated vapor pressure in the cool air. And some of the water will get moisture. The white cloud is seen due to the moister or the condensed water vapor.
Conclusion:
The white cloud is seen due to the presence of moisture present in the air in the lungs.
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