subject
Engineering, 06.03.2020 23:52 yabfegi9669

The permeability coefficient of a type of small gas molecule in a polymer is dependent on absolute temperature according to the following equation: PM=PMoexp(-QpR⁢T) where and PMo and Qp are constants for a given gas-polymer pair. Consider the diffusion of hydrogen through a poly(dimethyl siloxane) (PDMSO) sheet 11 mm thick. The hydrogen pressures at the two faces are 22 kPa and 4 kPa, which are maintained constant. Assume a condition of steady state diffusion and the following: PM0=1.45×10−8(cm3 STP)(cm)/cm2-s-Pa Qp=13.7⁢ kJ/mol Compute the diffusion flux [in (cm3 STP)/cm2 –s] at 348 K. for this diffusion system. J = Enter your answer in accordance to the question statement cm3 STP/cm2-s

ansver
Answers: 3

Other questions on the subject: Engineering

image
Engineering, 04.07.2019 18:10, skpdancer1605
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
image
Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
image
Engineering, 04.07.2019 18:10, leomessifanboy678
The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody
Answers: 2
image
Engineering, 04.07.2019 18:10, genyjoannerubiera
Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)
Answers: 1
You know the right answer?
The permeability coefficient of a type of small gas molecule in a polymer is dependent on absolute t...

Questions in other subjects: