Homework Help: Chemistry

Posted by Ankur on Saturday, January 12, 2013 at 10:24am.

A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x 10-4 moles/cm3 at 35 ∘C. The diffusivity of CO2 in the polymer is known to be 2.29 x 10-8 cm2/s at this temperature. How long will it take for 0.001 moles of CO2 to leak from the container at steady-state? Assume that the amount of carbon dioxide in the surroundings is insignificant. Express your answer in hours.

Chemistry - Anonymous, Saturday, January 12, 2013 at 1:12pm
20.3
Chemistry - Anonymous, Saturday, January 12, 2013 at 1:22pm
wrong answer
Chemistry - someguy, Sunday, January 13, 2013 at 12:33am
a) 1.74
Chemistry - Ankur, Sunday, January 13, 2013 at 4:22am
Thanx someguy
Chemistry - Anonymous, Sunday, January 13, 2013 at 6:17am
It was meant to be wrong. I don't like cheats. Maybe I'll tell MIT to see who put 20.3 in as an answer, so they'll know who cheated.
Chemistry - Anonymous, Sunday, January 13, 2013 at 6:46am
foolish guy
Chemistry - Anonychem, Sunday, January 13, 2013 at 9:23am
@Anonymous you will never stop people from cheating, so how about stop misleading people. A liar is worse than a cheat, by far. Stop lying.
Chemistry - Chemgam, Sunday, January 13, 2013 at 11:18pm
b) 0.551

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