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Where and qp are constants for a given gas-polymer pair

The permeability coefficient of a type of small gas molecule in a polymer is dependent on absolute temperature according to the following equation:

2319_dependent on absolute temperature.jpg

where and Qp are constants for a given gas-polymer pair. Consider the diffusion of hydrogen through a poly (dimethyl siloxane) (PDMSO) sheet 20 mm thick. The hydrogen pressures at the two faces are 10 kPa and 1 kPa, which are maintained constant. Compute the diffusion flux [in (cm3 STP)/cm2 -s] at 350 K. For this diffusion system.

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Chemical Engineering: Where and qp are constants for a given gas-polymer pair

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