A student accidentally spilled $920$ gm of liquid toluene on a $1$ m$2$ floor of a lab. Estimate the time

required for the spill to evaporate into a $1$ m thick air of the lab. Air is not soluble in toluene. Air pressure and

temperature are $1$ atm and $303$K$,$ respectively. The vapor pressure of toluene at $303$ K is $0\mathrm{.}075$ atm. Molecular

weight of Toluene is $92.$ The diffusivity of toluene in the air is $6\mathrm{.}08\backslash$times $10-6$ m$2/$s$.$ Make reasonable assumptions if

needed. $=8\mathrm{.}205\backslash$times $1053.$

$.$