User:OleLut/Dry air

In meteorology and thermodynamics dry air describes completely anhydrous air. Dry air is the borderline case to moist air and represents the left margin in the Mollier h-x-diagram at $$x=0$$ and the highest density at a given temperature.

Dry air is used in theoretical meteorology to formulate the virtual temperature.

Dry air at sea level currently has a global mean molar mass of about 28.96 g/mol. The value of the standard atmosphere is defined as 28.9644 g/mol.

Trivia
Colloquially, dry air refers to air with a comparatively low relative humidity. The low water vapor partial pressure in the air accelerates the drying out of mucous membranes, eyes and the surface of the skin.