Pure water at 27°C is flowing at a velocity of 3.5 m/s through a tube coated with benzoic acid of 6 mm in diameter. The length of the tube is 1.25 m. Calculate the concentration of benzoic acid at the...

Pure water at 27°C is flowing at a velocity of 3.5 m/s through a tube coated with benzoic acid of 6 mm in diameter. The length of the tube is 1.25 m. Calculate the concentration of benzoic acid at the outlet. The diffusivity of benzoic acid is 1.3 × 10^–5
cm and the solubility of benzoic acid is 0.03 g/L.