Time to completely dry a protective coating (30 pts) a cylindrical brass rod, 2 cm in diameter, is given a protective coating of lacquer of negligible thickness. after application in an acetone solvent, the lacquer is dried in a chamber supplied with acetone-free air and maintained at 80°c and at atmospheric pressure. if the vapor pressure of acetone at the surface of the coating may be assumed to remain constant at 410 mmhg until drying is complete and if acetone may be considered to be diffusing from the rod through a stagnant gas film 0.5 cm thick, how long does the lacquer take to dry? the original lacquer coating contains 10 mg of acetone per cm2 of rod surface. the rod ends do not have acetone and/or laqcquer. the diffusion coefficient of acetone through air is approximately 0.085 cm/sec.