Question 1 (35 points): A 4 m long and 1 m wide container is completely filled with ethanol. The flow rate of air flowing over the container is 10 m/s. The temperature of the ethanol in the air and in the container is 25C. The saturated vapor pressure of ethanol at 25C is 0.059 atm and the liquid density (pethanol) is 789 kg/m. What is the average mass transfer coefficient? What is the steady rate of ethanol loss due to evaporation from the surface? Note: Consider the bulk concentration ethanol in the air as zero! Information: Dethanol-air (25C) = 1.347x105 m/s; R = 0.082 For air at 25C v = (u/p) = 15.54x10-6 m/s L.atm mol.K = Methanol 46 g/mol