Question

How do you find realative Humidity?

Answer 1

Relative humidity is a term used to describe the quantity of water vapor that exists in a gaseous mixture of air and water (see: common misconceptions below).

Definition

Relative humidity is expressed as a percentage and is calculated in the following manner:

RH = {p_{(H_2O)} \over p^*_{(H_2O)}} \times 100%

Where symbols above have the following meaning:

p(H2O) is the partial pressure of water vapor in the gas mixture;

p*(H2O) is the saturated vapor pressure of water at the temperature of the gas mixture; and

RH is the relative humidity of the mixture under consideration.

Answer 2

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