Homework Help: Chemistry

Posted by selly on Friday, January 11, 2013 at 11:36am.

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.

(b) If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.

Chemistry - anonymous, Saturday, January 12, 2013 at 8:43am
somebody answer
Chemistry - p, Saturday, January 12, 2013 at 11:06am
please :(
Chemistry - ., Saturday, January 12, 2013 at 3:42pm
yes, we need help
Chemistry - .., Saturday, January 12, 2013 at 4:11pm
anyone? I am one percent away from A, this question left
Chemistry - helpmeimbad, Saturday, January 12, 2013 at 6:56pm
you should be ashamed of yourself
Chemistry - someguy, Sunday, January 13, 2013 at 12:31am
a) 1.74
Chemistry - selly, Sunday, January 13, 2013 at 4:39am
B?
Chemistry - qwerty, Sunday, January 13, 2013 at 4:06pm
b=0.551

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