A large sheet of material 40 mm thick contains dissolved hydrogen (H 2 ) having a uniform
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A large sheet of material 40 mm thick contains dissolved hydrogen (H2) having a uniform concentration of 3k mol/m3. The sheet is exposed to a fluid stream that causes the concentration of the dissolved hydrogen to be reduced suddenly to zero at both surfaces. This surface condition is maintained constant thereafter. If the mass diffusivity of hydrogen is 9 x 10-7 m2/s, how much time is required to bring the density of dissolved hydrogen to a value of 1.2 kg/m3 at the center of the sheet?
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KNOWN Initial concentration of hydrogen in a sheet of prescribed thickness Surface ...View the full answer
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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