Consider a liquid solution containing 25.0 g of water (18.02 g/mol) dissolved in 100.0 g of ethanol (C₂H₅OH, 46.08 g/mol) at 25 C. The vapor pressure of pure water is 23.8 mm Hg and that of pure ethyl alcohol is 61.2 mm Hg at 25C.

A. Which liquid component is more volitile, ethanol or water?

B. What is the mole fraction of ethyl alcohol in the liquid phase?

C. What is the vapor pressure of ethyl alcohol and the vapor pressure of water above the solution? What is the total pressure of the solution?

D. What is the mole fraction of ethyl alcohol in the gas phase?