- Mass Transfer Is Occurring From A Naphthalene Ball Having An Initial Diameter Of 20 Mm The Sphere Is In A Very Large Vo 1 (40.45 KiB) Viewed 21 times
Mass transfer is occurring from a naphthalene ball having an initial diameter of 20 mm. The sphere is in a very large volume of still air at 52.6°C with 1 atm absolute pressure. The vapour pressure of naphthalene at 52.6°C is 1.32x10-3 atm. (i) If the diffusivity of naphthalene in air at 0 °C is 5.16 x 10-6 m²/s, calculate the diffusivity of naphthalene for the system. (ii) Calculate the rate of evaporation of naphthalene from the surface in kgmol/h.m². (iii) What is the rate of evaporation of naphthalene (kgmol/h) if the diameter is twice bigger than the previous naphthalene ball?