3) Give reasons.
1. As we go higher the vapour holding capacity of the air will decrease.
Answers
Answer:
When air holds as much water vapor as it can for a given temperature (100% relative humidity), it is said to be saturated. If saturated air is warmed, it can hold more water (relative humidity drops), which is why warm air is used to dry objects--it absorbs moisture.
This happens because temperature of air is directly proportional to its water holding capacity. Because, as the temperature increases, the heat overcomes law of attraction between the air molecules. This helps in making space for water vapours between the molecules and vice versa. As we go up, the temperature evidently decreases, as a result, the water holding capacity of air decreases too. Another case is that warm air is used to extract moisture from an object, using the same principal
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