2. A mixture of A and B conforms closely to Raoult's law. The pure component vapour pressures PÅ and På in kpa at T, K are given by 2945 InP = 14.27 – т- 49 2973 InP = 14.20 – т-64 If the bubble point of a certain mixture of A and B is 349 K at total pressure of 80 kPa. Fin composition of the first vapour that forms.

If ice homogeneously nucleates at -57.8°C, calculate the critical radius given values of -3.1 x 108 J/m³ and 25 x 10-3 J/m2, respectively, for the latent heat of fusion and the surface free energy 0.9854 x 10-10 m O 0.1284 x 10-5 m O 0.5981 x 10-11 m O 0.7618 x 10-9 m

5.20. Multistage stripper. A stripper at 50 psia with three equilibrium stages strips 1,000 kmol/h of liquid at 300°F with the following molar composition: 0.03% Cı, 0.22% C2, 1.82% C3, 4.47% nC4, 8.59% nC, 34.87% nCio. The stripping agent is 1,000 kmol/h of superheated steam at 300 F and 50 psia, Use the Kremser equation to estimate the com positions and flow rates of the stripped liquid and exiting rich gas Assume a K-value for Cio of 0.20 and that no steam is absorbed. Calculate the dew-point temperature of the exiting gas at 50 psia. If it is above 300°F, what can be done?