The fuel tank on your car ruptures, spilling 5 gallons of gasoline on the surface of the paved parking lot, forming a puddle that is nominally round and approximately 1 cm thick on a cloudy spring day when the temperature is 55F and the pressure is nominally 1 atm. The wind speed is about 10 miles per hour. Assuming pseudo-state conditions apply, how long will it take for all the gasoline to evaporate? Assume that none of the gasoline permeates the paved parking lot or otherwise leaves the puddle except by evaporation. You may also assume that heat transfer is good and the puddle is uniformly at ambient temperature.

Some potentially useful data include:

• DAB (gasoline in air at 55F) = 0.0763 cm2/s
• Pv (gasoline at 55F) = 0.32 bar
• MW gasoline = 66 g/mol
• gasoline =0.67 g/cm³
• (air at 55F) = 1.8E-04 g/cm-s