PROBLEM #4 Total lung capacity of a typical adult is approximately 5.0 L. Approx

Question

PROBLEM #4

Total lung capacity of a typical adult is approximately 5.0 L. Approximately 20% of the air is oxygen. At sea level and at an average body temperature of 37 degree C, how many moles of oxygen do the lungs contain at the end of an inhalation? The gauge pressure in your car tires is 2.50 times 10^5 N/m^2 at a temperature of 35.0 degree C when you drive onto a ferry boat to Alaska. What is their gauge pressure later, when their temperature has dropped to -40.0 degree C? Much of the gas near the Sun is atomic hydrogen. (a) What is the average kinetic energy (in Joules) of hydrogen atoms on the 5500 degree C surface of the Sun? (b) What is the average velocity v_rms of the hydrogen atoms?

Explanation / Answer

Pressure is directly proportional temperature,

Temperature becomes (273+10)/(273+35) times

= 0.9188 times

Required Pressure =0.9188*(gauge pressure +atmospheric pressure)

= 0.9188*(2.5e5+101325) = 322797 Pa

Required Gauge pressure = 322797-101325

= 221472 Pa

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