A certain volume of air holds 20 grams of water vapor. At that temperature, the maximum amount the air can contain is 100 grams. What is the relative humidity?

Question

15-02-2020
Chemistry

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A certain volume of air holds 20 grams of water vapor. At that temperature, the maximum amount the air can contain is 100 grams. What is the relative humidity?

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Answer:

Relative humidity is the ratio of mass of water vapor to the maximum mass of water vapor required to saturate the air at a given temperature. It is expressed in percentage and depends on temperature and the pressure of the system of interest.

The relative humidity from the given question is 20%

Explanation:

Relative humidity is the ratio of mass of water vapor to the maximum mass of water vapor required to saturate the air at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest.

Relative humidity is given as;

(Mass of water vapor present / maximum mass of water vapor required to saturate the air) * 100%

Given;

mass of water vapor = 20 grams

maximum mass of water vapor required to saturate the air = 100 grams

Relative humidity = (20/100) * 100

Relative humidity = 20%