Distilled water at 75ºF is suddenly exposed to oxygen gas at 75ºF. Determine the time before the oxygen concentration in the water is 0.1% by mass at a point 0.05 inches below the surface of the distilled water.

What will be an ideal response?


This is a transient convection mass transfer problem and can be modelled as a semiinfinite

solid (liquid, in this case) with a rapid boundary condition change. The use of

Equation 8-59 is appropriate here.



Physics & Space Science

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