Problem 3. (35 Points) An injectable slow release drug consists of small (1.00 um diameter) spheres containing a pure drug (component A) surrounded by a thin (200 nm) polymer membrane. The mass transfer in the liquid outside the capsules (liquid B) can be assume to behave like mass transfer in a suspension He = 1.25 CP Pe = 1.12 g/cm Pparticle = 1.05 g/cm Das = 0.735 x 105 cm/s a) Determine the mass transfer coefficient(ke') in cm/s outside the spherical capsule. (15 points) Problem 3. (35 Points) An injectable slow release drug consists of small (1.00 um diameter) spheres containing a pure drug (component A) surrounded by a thin (200 nm) polymer membrane. The mass transfer in the liquid outside the capsules (liquid B) can be assume to behave like mass transfer in a suspension He = 1.25 CP Pe = 1.12 g/cm Pparticle = 1.05 g/cm Das = 0.735 x 105 cm/s a) Determine the mass transfer coefficient(ke') in cm/s outside the spherical capsule. (15 points)