An open tank contains benzene at 1 atm, 298 K. The distance from the surface of the benzene layer to the top of the tank is 3 m. It is assumed that the air in the vessel is motionless while there is...

An open tank contains benzene at 1 atm, 298 K. The distance from the surface of the benzene layer to the top of the tank is 3 m. It is assumed that the air in the vessel is motionless while there is sufficient air motion outside to remove the benzene vapour arriving at the top surface. Determine the rate of evaporation of benzene per sq. m. of the benzene surface (p_A1
= 0.01 atm). Take D = 0.0962
 10^–4
m²/s.