Human lung capacity varies from about 4 L to 6 L, so we shall use an average of

ID: 1529980 • Letter: H

Question

Human lung capacity varies from about 4 L to 6 L, so we shall use an average of 5.0 L. The air enters at the ambient temperature of the atmosphere and must be heated to internal body temperature at an approximately constant pressure of 1.0 atm in our model. Suppose you are outside on a winter day when the temperature is -15 F. Suppose instead that you manage to inhale the full 5.0 L of air in one breath and hold it in your lungs without expanding (or contracting) them. How much heat would your body have had to supply in that case to raise the air up to internal body temperature of 37 degrees C? Express your answer in joules to three significant figures.

Explanation / Answer

So multiply by the volume and the change in temperature.
E = .001297 J/cc K * 5 L * (1000 cc / 1L) * (310.15K - 247.039)
E = 409.274 J

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Human lung capacity varies from about 4 L to 6 L, so we shall use an average of

Human lung capacity varies from about 4L to 6L, so we shall use an average of 5L

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Human lung capacity varies from about 4 L to 6 L, so we shall use an average of

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