Ideal Gas Law - example

P*V = n*R*T V = 340 m3 ;

P = 1.01 x 105 Nt/m2 ; R = 8.3 Joules/mole*K;

T = 72oF = (72-32)*5/9 + 273 = 295 K.

Thus, n = P*V / R*T = 14,000 moles .

From before, 5 moles gives 4,000 seconds, so

t = 4,000 seconds/5 moles * 14,000 moles

= 11,200,000 seconds = 3,100 hours of air per person = about 100 days of air per person (if the oxygen is completely used).

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