Four gallons of gasoline (A) is poured on a surface area of 20 ft2. Determine the...

 

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Four gallons of gasoline (A) is poured on a surface area of 20 ft2. Determine the time necessary for the gasoline to evaporate into still dry air (B). The diffusivity 6.5 ft2/hr. Evaporation occurs through a 6 in. film at 65°F. The gasoline has is DAB a vapor pressure of 2 psia, density of 800 kg/m3 and a molar mass of 96 g/mol. Consider the film as the distance that the gasoline vapor will travel and that there is negligible concentration of gasoline at the top of the film. Four gallons of gasoline (A) is poured on a surface area of 20 ft2. Determine the time necessary for the gasoline to evaporate into still dry air (B). The diffusivity 6.5 ft2/hr. Evaporation occurs through a 6 in. film at 65°F. The gasoline has is DAB a vapor pressure of 2 psia, density of 800 kg/m3 and a molar mass of 96 g/mol. Consider the film as the distance that the gasoline vapor will travel and that there is negligible concentration of gasoline at the top of the film.

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