Question

how can you relate the formation of water droplets on the outer surface of bottle taken out of refrigerator with fermentation of dew

Answer 1

The formation of dew depends on two factors :
1)The temperature
2) The moisture holding capacity of the air.
Of these two the temperature is the dominating factor.
When the bottle is taken out of the refrigerator then the temperature is very low as compared to the surrounding .As a result the moisture present in the surrounding condense and dew is formed.
Hope it helps.

Answer 2

Explanation:

The water vapor of the air depends upon the specific temperature.

Dew point: An unsaturated air at a certain temperature is

taken and its temperature is decreased, a temperature is reached at which the air becomes saturated with

vapor. This temperature is called the dew point temperature.

Saturated with vapor: If the amount of

air exceeds this limit, the excess vapor converts into water

droplets. When the air contains maximum

possible water vapor, it is said to be saturated

with vapor at that temperature.

Now, if we take a water bottle out of a

refrigerator, we will observe tiny water droplets on it:

(i) This means, due to decrease in

temperature, the air cools.

(ii) It becomes saturated with water vapor.

(iii) As a result, the excess water vapor gets

converted into tiny droplets.

(iv) The dew-point temperature is decided by the amount of vapor in

the air.

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