Question:Ethylene dibromide (C2H4Br2) and 1,2-dibromo propane form a
series of ideal solutions over the whole range of composition. At 85°C
vapour pressures of these two liquids are 173 and 127 torr respectively.
What would be the mole fraction of ethylene dibromide in a solution at
85°C equilibrated with 1:1 molar mixture in the vapour?