Krypton gas with 6 kmol/hr is pumped to a carbon fiber prepreg production tank that is full of liquid buthanol. The output flow that is coming out of the tank contains %40 mol buthanol vapor. Also, buthane gas with 3kmol/hr enters to this production tank. Please calcute the amount of time that is required to evaporate 20m3 liquid buthanol. The output flow contains % 50 mol buthane (Notes: dkr = 3.749 g/cm3, MKr = 83.80g/mol, dbuthanol = 0.81 g/cm3, Mbuthane = 74 g/mol, dbuthane = 2.48 g/cm3, Mbuthane = 58g/mol)