An adult takes about 12 breaths per minute inhaling roughly 500mL of air with each breath. The molar compositions of the inspired and expired gases are as follows: The inspired gas is at 24?C and 1 atm, and the expired gas is at body temperature and pressure?37?C and 1 atm. Nitrogen is not transported into or out of the blood in the lungs, so that (N₂)_in = (N₂)_out.

(a) Calculate the masses of O₂, CO₂, and H₂O transferred from the pulmonary gases to the blood or vice versa (specify which) per minute.

(b) Calculate the volume of air exhaled per milliliter inhaled.

Transcribed Image Text:

Species 0₂ CO₂ N₂ H₂O Inspired Gas (%) 20.6 0.0 77.4 2.0 Expired Gas (%) 15.1 3.7 75.0 6.2