Chemistry
posted by Ellen .
Typically, when a person coughs, he or she first inhales about 2.50 L of air at 1.00atm and 25 degreesC. The epiglottis and the vocal cords then shut, trapping the air in the lungs, where it is warmed to 37 degrees C and compressed to a volume of about 1.70L by the action of the diaphragm and chest muscles. The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?
Express your answer numerically in atmospheres.

I would use PV = nRT and solve for n when inhaling 2.50 L.
Then use PV = nRT again, with n from above, new V (1.70 L) and new T. Solve for new P (in atm). 
1.53 atm

Ashley is wrong

1.35 homie!

Use this formula to find final pressure before the release:
P1V1/T1 = P2V2/T2
Isolate P2:
P2=P1V1T2/T1V2
= ((1.00atm)(2.50L)(310.15K))/ ((298.15K) (1.70L)
=1.529776.....atm
w/ sig figs = 1.53 atm
(remember to convert *C to kelvin) 
155
Respond to this Question
Similar Questions

Chemistry II
Under water where the temperature is 17C and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank. a.How many moles of gas are in his lungs? 
Thermal physics
when breathing slowly a person inhales air at room temperature and exhales it at body temperature. We may assume that the lungs maintain ordinary atmospheric pressure as they expand. If a resting person inhales 0.6L of air at 24 degrees … 
Chemistry
A scuba diver 40ft below the ocean surface inhales 50.0 ml of compressed air mixture in a scuba tank at a pressure of 3.00 atm. and a temperature of 8 C. What is the pressure of air in the lungs if the gas expands to 150. ml at a body … 
Math
Having a lot of trouble with this one: Q) Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the remaining in the lungs even after … 
CALCULUS HELP NEEDED ASAP!
Having a lot of trouble with this one: Q) Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the remaining in the lungs even after … 
Chem
if a person inhales 0.1 mol air per breath, and the pressure is 92kpa and body temp is 37 degrees celcius what is the maximum volume of air this person can inhale 
Math
During normal breathing, about 12% of the air in the lungs is replaced after one breath. Write an exponential decay model for the amount of the original air left in the lungs if the initial amount of air in the lungs is 500 mL. How … 
chemistry
an average adult inhales a volume of 0.50 liter of air into the lungs with each breath.If the air is warmed from room temperature (20 degree celsius) to body temperature (37 degree celsius),what is the volume of air exhaled? 
Math CALCULUS HELP PLEASE
Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the amount remaining in the lungs even after the deepest exhalation (i.e. the … 
Math
When at rest an average adult breathes in and out every 4s. the average minimum amount of air the lungs is 0.08L and the average maximum amount of air in the lungs is 0.82L. Assume the lungs have a minimum amount of air at t=0 where …