(Mass transfer). Atmospheric air at a temperature of 300 K flows through the short pipe segment shown for Problem 4.19. The diameter of the pipe segment is 5 cm, and its length is 1.5 cm. The air...

(Mass transfer). Atmospheric air at a temperature of 300 K flows through the short pipe segment shown for Problem 4.19. The diameter of the pipe segment is 5 cm, and its length is 1.5 cm. The air Reynolds number defined based on the

pipe diameter is 1500. The surface of the pipe segment is covered by a layer of naphthalene. Calculate the average mass transfer coefficient in two ways: (a) by approximating the flow on the pipe surface as the flow on a flat plate and (b) by using the following arrangement, for mass transfer, of the correlation of (see Appendix Q):