On average an adult person breathes in about 7 Liters of air

On average, an adult person breathes in about 7 Liters of air per minute. Assuming atmospheric pressure and 20°C air temperature, estimate the mass of air in kilograms that a person breathes in per day

Solution

At 20 °C and 101.325 kPa, dry air has a density of 1.2041 kg/m³

If 7 litres of air per minute, per day= 7*60*24 = 10080 litres = 10.080 m3

Therefore, for 10.080m3, mass of air = 1.2041*10.080 =12.137 KG/day