PROBLEMS

7.1-1.

Unsteady-State Diffusion in a Thick Slab. Repeat Example 7.1-2 but use a distribution coefficient K = 0.50 instead of 2.0. Plot the data.

A1: Ans. c = ci = 5.75 × 102 (x = 0), c = 2.78 × 102 (x = 0.01 m), cLi = 2.87 × 102 kg mol/m3
7.1-2.

Plot of Concentration Profile in Unsteady-State Diffusion. Using the same conditions as in Example 7.1-2, calculate the concentration at the points x = 0, 0.005, 0.01, 0.015, and 0.02 m from the surface. Also calculate cLi in the liquid at the interface. Plot the concentrations in a manner similar to Fig. 7.1-3b, showing interface concentrations.

7.1-3.

Unsteady-State Diffusion in Several Directions. Use the same conditions as in Example 7.1-1 except that the solid is a rectangular block 10.16 ...

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