The cylindrical barrel of 0.6 m length is half filled with an organic liquid. The molar weight of the Organic Liquid is 62 gr. If the lid of the tank is opened, what time will it take for 4 % of the organic matter to evaporate? The diffusion coefficient of organic matter at 25 C and 1 bar is DAB-3,5.10-6 m/ s. Vapor pressure at 25 C is given as 0.0312 bar and its density is given as 725 kg/ m