1.

For one dimensional diffusion in the radial direction only for cylinder and sphere, the fick s second law becomes:

A. t C<sub>a</sub>/ T= D<sub>ab</sub>/r( / r(r Ca/ r)
B. t C<sub>a</sub>/ T= D<sub>ab</sub>/( / r( Ca/ r)
C. t- C<sub>a</sub>/ T= D<sub>ab</sub>/r( / r(r Ca/ r)
D. t C<sub>a</sub>/ T= D<sub>ab</sub>/r( / r(r/ r)
Answer» B. t C<sub>a</sub>/ T= D<sub>ab</sub>/( / r( Ca/ r)


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