Liquid methanol is accidentally spilt on a 1 m × 1 m laboratory bench and covered the entire bench surface. A fan is providing a 20 m/s air flow parallel over the bench surface. The air is maintained at 25°C and 1 atm, and the concentration of methanol in the free stream is negligible. If the methanol vapor at the air-methanol interface has a pressure of 4000 Pa and a temperature of 25°C, determine the evaporation rate of methanol in molar basis.