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Q 1 ) A blister package typically consists of two main components: a flat lidding sheet made of impermeable aluminum foil, and a second, formed

Q1) A blister package typically consists of two main components: a flat lidding sheet made of
impermeable aluminum foil, and a second, formed sheet made of polymer material. The formed
sheet, with a thickness (L) of 50m, contains troughs designed to hold individual tablets. Each
trough has a diameter (D) of 5mm and a depth (h) of 3mm. The binary diffusion coefficient
for water vapor in the polymer material is given as
DAB=610-14m2s, while aluminum is known to be impermeable to water vapor.
Given molar concentrations of water vapor at the outer and inner surfaces of the polymer
sheet is CAl=4.5**10-3kmolm3 and CA2=0.5**10-3kmolm3 respectively.
Determine the rate at which water vapor transfers through the trough wall to the tablet.
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