answer 5,

In very cold weather a signicant mechanism for heat loss by the human body is energy expended in warming the air taken into the lungs with each breath. On a cold winter day when the temperature is -20 degrees Celsius. what amount of heat is needed to warm to body temperature (37 degrees Celsius) the 0.50 L of air exchanged with each breath? Assume that the specic heat of air is 1020 Jcg.l( and that 1L of air has a mass of 1.3x10"-3 kg. 0 40 Joules O 38 Joules O 34 Joules O 32 Joules