Question

A gasoline tank in a standard automobile (filling hole diameter = 4 in) contains 15 gal of gasoline and can be filled in about 5 min. The molecular weight of gasoline is 92, and its vapor pressure at 77°F is 4.6 psi. Estimate the concentration (in ppm) of gasoline vapor as result of this filling operation. Assume a ventilation rate of 3000 ft³/min. TLV for gasoline is 300 ppm. Diffusion coefficient of water at 77°F is 1.63 ft/min. Assume an adjustment factor is 0.5.

Answer 1