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Question
Heat transfers from your lungs and breathing passages by evaporating water. (a) Calculate the maximum number of grams of water that can be evaporated when you inhale 1.50 L of $37^\circ\textrm{C}$ air with an original relative humidity of 40.0%. (Assume that body temperature is also $37^\circ\textrm{C}$ .) (b) How many joules of energy are required to evaporate this amount? (c) What is the rate of heat transfer in watts from this method, if you breathe at a normal resting rate of 10.0 breaths per minute?
1. $39.6 \textrm{ mg}$
2. $96.2 \textrm{ J}$
3. $16.0 \textrm{ W}$
Solution Video