You are thrown into a small dark room. The door clangs shut and you fear that th

Question

You are thrown into a small dark room. The door clangs shut and you fear that there are no holes or cracks for ventilation. Assuming (for ease of calculation only!) a steady rate of basal oxygen consumption, how long will your air supply last? Reaching around, you estimate that the floor is 2 x 2 m and the ceiling is about 2 m high. You remember that air is approximately 20% oxygen, and that your basal oxygen consumption is about 16 L/h. Fortunately, the room is at STP, so you can neglect corrections for temperature and pressure

Explanation / Answer

Volume of room

V = 2*2*2 = 2^3 =8 m3

this is air

volume of O2 --> 0.20*8 = 1.60 m3 = 1600 L of Oxygen

now..

time = Volume/rate = 1600 /16 = 100 hours

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