[" Whe sign of "Delta_(" mix ")H" related to positive and negatiye deviations from Raoult's law? "],[" An aqueous solution of "2%" non-volatile solute exerts a pressure of "1.004" bar "],[" at the normal boiling point of the solvent.What is the molar mass of the solute? "],[" Heptane and octane form an ideal solution.At "373." K the vanour pressures of "]