Question

A person of mass M = 50 kg and height H = 1.5 meters breathes 300 liter of air per hour making 600 breaths. Inhaled air contains 79% of nitrogen and 21% of oxygen at temperature Tc = 290 K, while exhaled air contains 79% of nitrogen, 16% of oxygen and 5% of carbon dioxide at temperature Th = 310 K. Each liter of consumed oxygen produces 4.83 Cal of energy. Calculate the amount of heat per hour (fraction numerator C a l over denominator h r end fraction ) required to raise the temperature of inspired air from Tc to Th assuming air pressure at 1 atm = 10 to the power of 5 space P a .

Answer 1

Therefore,

Amount of heat per hour required to raise the temperature of air from Tc to Th = 148303.7 cal.