What is the relative humidity in this?

Question

Sample

T °C

Mass of Water Vapor

Mass of Water Vapor at Saturation

Sample 1

20°

Mass of Water Vapor 12 g

17 g

Sample 2

32°

Mass of Water Vapor 14 g

34 g

Sample 3

41°

Mass of Water Vapor 20 g

56 g

What is the relative humidity of air sample 2 in the table? ____________________

Answer 1

The relative humidity (hr) is equal to the actual vapor density divided by the saturated vapor density at the current air temperature. The relative humidity depends on temperature only as it affects the saturated vapor density in the calculation. Assuming the 'Mass of Water Vapor at Saturation' given in the data above is calculated at the given temperature, then:

hr = 14/34 = 0.412 = 41.2%