Determine the vapor pressure of water for this solution? Sugar is dissolved in the hot water at 45oC until the mole fraction of water decreases to 0.862. The vapor pressure of pure water at this temperature is 72 torr. 29.0 g of the nonvolatile solute urea (M.W. = 60.06 g/mol) is dissolved in the 327 g of water at 60oC. The vapor pressure of pure water at this temperature is 149 torr. Determine the equilibrium vapor pressure of water for this solution?