Question

GIVE THE RELATION BETWEEN HUMIDITY AND THE RATE OF EVAPORATION

Answer 1

hey frnds
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Relative humidity is a ratio of actual amount of water vapour (content) in the air compared to the maximum water vapour the air is able to hold (capacity) at that temperature. It is expressed as percentage. Relative humidity does not tell how much water vapour is actually in the air. but, it tells how close the air is to being saturated. So, air is said to be saturated or full if relative humidity is 100%.Relative humidity (Rh) is inversely related to the air temperature .i.e. if temperature is increases, the Rh decreases and vice versa. That's why the Rh is higher at higher surafaces(temperature decreases with height), sunrising(minimum temperature) and lower at ground(temperature is grater than the higher surfaces), late afternoon(Maximum temperature). The following figure shows clearly the relation bet ween air's temperature and relative humidity.

Figure: the relation between air's temperture and relative humidity
Rh compares the actual concentration of the water vapour in the air with the concentration of water vapour  in that same air at saturation (there is a maximum limit of water vapour that air(given quantity) can hold at agiven temperature. when this limit is reached, the air is said to be saturated). "So, the air is said to be saturated if the ralative humidity is 100%".

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I hope its help you