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Pressure and Volume relationships
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Robbie91:
Ok, this question has been stumping me a bit:
An oxygen cylinder has a volume of 50 liters and a pressure of 200 atmospheres. If the cylinder is used to supply oxygen to a patient at a flow of two liter/minute (at 1 atm pressure), how long will the tank last?
Disregarding the gas laws in my book for now (since none seemed to apply---nor could I find a comparable problem), I multiplied 50 by 200 to get 10,000 and then divided by 2 for the liters/min and I got 5000 minutes, 5000/60 is 83.3 hours.
If this is wrong :-\, could someone point me in the right direction as to which gas law I should be looking at to figure this out. Thanks.
Borek:
It's OK.
You will get exactly the same result using pV = const (or p1V1 = p2V2) - which is one the gas laws you have just disregarded.
Donaldson Tan:
i would like to add: assuming isothermal condition
ps: this is my 1234th post. i wonder when i will reach 12345. LOL! finally back from my european trip. it has been a wonderful time.
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