[Louis_05]

I was given this problem in my Chem 1212 class and don't have a clue as to what information is relevant to the problem. Can anyone help solve this problem?


Trichloroethane, C2H3Cl3, is the active ingredient in aerosols that claim to stain proof men’s ties.  Trichloroethane has a vapor pressure of 100.0 mm Hg at 20.0 °C and boils at 74.1 °C.  An uncovered cup (½ pint) of trichloroethane (d – 1.325 g/mL) is kept in an 18 ft3 refrigerator at 39 °F.  What percentage (by mass) of the trichloroethane is left as a liquid when equilibrium is established?