Question

A large volume of pure air is flowing at 101.325 kPa and 300 K over a surface made of naphthalene. The naphthalene on the surface is vaporizing to pure air. The partial pressure at the naphthalene surface is 0.25 atm and its k’c has been estimated to be 7.05x10-5 m/s. With an appropriate label, sketch the convection process diagram with the given information. Calculate the mass transfer coefficient kG in kgmol/s.m2 .Pa and hence, predict the vaporization rate, NA in kgmol/s.m2 .

Answer 1