Q. 535.0( 1 Vote )
Temperature of water=20
Droplets starts to form at 10.
Therefore, dew point is =10. This is because at dew point vapor pressure becomes saturated vapor pressure and after that air cannot hold more moisture and will start to condense.
At boiling point, saturation vapor pressure becomes equals to atmospheric pressure.
So, given that,
At temperature 20 pressure is 17.5mm of Hg.
SVP (saturation vapor pressure) at 20 = 17.5mm of Hg
SVP at dew point i.e. 10 =8.9mm of Hg
Now relation between relative humidity and dew point is
Relative humidity in the room is 51%.
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