Help plz with chemistry? - how many times i can fill my tank with a scuba tank
You decide to dive for the first time this winter when the water temperature is 6.0 degrees. Your tank has a volume of 13.50 L, and is equipped with air at a pressure of 165.0 bar filled. If your metabolism demands of the body that you consume 20.4 g of oxygen per minute, as long as you dive to 75 meters if it should allow 6 minutes to return to the surface. Let us assume that the mole fraction of O2 in the air is 0.2095.
Monday, January 18, 2010
How Many Times I Can Fill My Tank With A Scuba Tank Help Plz With Chemistry?
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Assume ideal gas:
(n number of moles) = PV / RT
P = 165 atm
V = 13.5 L
T = 279 K
R = 0.0802 L-atm/K-mole
Find n, the number of moles of air.
O2 is 20.95% of the air, then multiply by 0.2095 mol O2 N to be found.
O2 has a molecular weight of 32 g / mol (see their figs GIS), multiply the number of moles of molecular weight. The amount in grams of O2 is.
Let ie the grams of 20.4 g / minute to see many minutes you can stay down.
Remember, six mionutes subtract that amount and the amount of time one can remain at 75 meters.
This is the maximum on the road - for safety, do not want to get to the surface as the air starts.
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