Toluene (l) and water(2) are essentially immiscible as liquids. Determine the dew point temperatures and the compositions of the first drops of liquid formed when vapor mixtures of these species with mole fractions z1 = 0.2 and z1 = 0.7 are cooled at the constant pressure of 101.33 kPa. What is the bubble-point temperature and the composition of the last drop of vapor in each case?, App. B, for vapor- pressure equations.