How does density of air decreses with increase in humidity. Please explain in detail.
How does density of air decreses with increase in humidity. Please explain in detail.
Ritvik Gautam , 15 Years ago
Grade 12
General Physics> Density...
1 Answers
Sudheesh Singanamalla
This occurs because the molecular mass of water (18 g/mol) is less than the molecular mass of dry air (around 29 g/mol). For any gas, at a given temperature and pressure, the number of molecules present is constant for a particular volume. So when water molecules (vapor) are added to a given volume of air, the dry air molecules must decrease by the same number, to keep the pressure or temperature from increasing. Hence the mass per unit volume of the gas (its density) decreases.
Approved Last Activity: 15 Years ago
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