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Hyperbaric chambers, which provide high pressures (up to 6 atm) of either air or

ID: 584396 • Letter: H

Question

Hyperbaric chambers, which provide high pressures (up to 6 atm) of either air or pure oxygen, are used to treat a variety of conditions, ranging from decompression sickness in deep-sea divers to carbon monoxide poisoning.

A. What is the partial pressure of O2 (in millimeters of Hg) in a hyperbaric chamber pressurized to 3 atm with air that is 21 % in O2?

B. What is the solubility of O2 (in grams per 100 mL) in the blood at this partial pressure? The solubility of O2 is 2.1 g/100mL for PO2 = 1 atm.

Explanation / Answer

A. partial pressure of o2 = 21/100*3 = 0.63 atm

B. solubility of O2 = 2.1 g/100 ml for PO2 = 1 atm

   solubility of O2 at this partial pressure(S2) =

      P1/S1 = P2/S2

       1/2.1 = 0.63/S2

solubility of O2 at this partial pressure(S2) = 1.323 g/100 ml