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 )