Answer to Question #136307 in Physical geography for Varun Nadig

Question

Assuming that a different air mass has a relative humidity of 40% at a temperature of 25 degrees Celsius, what is the actual humidity content, expressed as g/kg?

Answer 1

The relative humidity is defined by the following expression (http://www.classzone.com/vpg_ebooks/ml_earthscience_na/accessibility/ml_earthscience_na/page_392.pdf):

where is the maximum gramms of water that one kilogram of air can hold at given temperature (units ). For temperature , have (see https://www.engineeringtoolbox.com/humidity-ratio-air-d_686.html):

Thus, the is:

Answer. .