An airplane is pressurized to 650 mmHg

An airplane is pressurized to 650 mmHg

 

 

An airplane is pressurized to 650 mmHg, which is the atmospheric pressure at a ski resort at 13,000 ft altitude.

a. if air is 21% oxygen, what is the partial pressure of oxygen on the plane?

b. If the partial pressure of oxygen drops below 100 mmHg, passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped?

 

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돌턴의 분압법칙

P_a = X_a • P_tot

( 식 설명 https://ywpop.tistory.com/48 )

 

 

a.

P_O2 = 650 mmHg × (21/100) = 136.5 mmHg

 

 

b.

100 mmHg = P_tot × (21/100)

P_tot = 100 / (21/100) = 476.2 mmHg