A liquid solution consists of 0.25 mole fraction ethylene dibromide, C2H4Br2, and 0.75 mole fraction propylene dibromide,

Question:

A liquid solution consists of 0.25 mole fraction ethylene dibromide, C2H4Br2, and 0.75 mole fraction propylene dibromide, C3H6Br2. Both ethylene dibromide and propylene dibromide are volatile liquids; their vapor pressures at 85°C are 173 mmHg and 127 mmHg, respectively. Assume that each compound follows Raoult's law in the solution. Calculate the total vapor pressure of the solution.