Question

4. Vapor-Liquid-Liquid equilibrium (VLLE) of a binary mixture (30 pts) When two moles of A and two moles of B are placed in a vessel at 10 bar and 50°C, after equilibrium is established, two liquid phases are formed: one contains 10% A/90% ? (?- phase) and the other one contains 99.9% A/0.1% B (?-phase). (a) [4] Determine the activity coefficient of A in the ?-phase. (b) [3] Is the 2-suffix Margules equation appropriate for this system? Explain your answer. The pressure is reduced at constant temperature until the bubble point is achieved. At this point, the incipient vapor phase contains 40% A and the two liquid phases are still present. The saturation pressures of A and B, at 50°C, are 1.0 and 2.0 bar, respectively, and the gases can be assumed ideal. (c) [4] Calculate the pressure, in bar, at which the VLLE is found at T = 50°C. (Hint: make use of the knowns to calculate the unknowns). (d) (4) Determine the value of the Henry's Law constant of component B in A.

          4. Vapor-Liquid-Liquid equilibrium (VLLE) of a binary mixture
(30 pts)
When two moles of A and two moles of B are placed in a vessel at 10 bar and 50°C, after
equilibrium is established, two liquid phases are formed: one contains 10% A/90% ? (?-
phase) and the other one contains 99.9% A/0.1% B (?-phase).
(a) [4] Determine the activity coefficient of A in the ?-phase.
(b) [3] Is the 2-suffix Margules equation appropriate for this system? Explain your answer.
The pressure is reduced at constant temperature until the bubble point is achieved. At this
point, the incipient vapor phase contains 40% A and the two liquid phases are still present. The
saturation pressures of A and B, at 50°C, are 1.0 and 2.0 bar, respectively, and the gases can be
assumed ideal.
(c) [4] Calculate the pressure, in bar, at which the VLLE is found at T = 50°C. (Hint: make use of
the knowns to calculate the unknowns).
(d) (4) Determine the value of the Henry's Law constant of component B in A.

4. Vapor-Liquid-Liquid equilibrium (VLLE) of a binary mixture
(30 pts)
When two moles of A and two moles of B are placed in a vessel at 10 bar and 50°C, after
equilibrium is established, two liquid phases are formed: one contains 10% A/90% ? (?-
phase) and the other one contains 99.9% A/0.1% B (?-phase).
(a) [4] Determine the activity coefficient of A in the ?-phase.
(b) [3] Is the 2-suffix Margules equation appropriate for this system? Explain your answer.
The pressure is reduced at constant temperature until the bubble point is achieved. At this
point, the incipient vapor phase contains 40% A and the two liquid phases are still present. The
saturation pressures of A and B, at 50°C, are 1.0 and 2.0 bar, respectively, and the gases can be
assumed ideal.
(c) [4] Calculate the pressure, in bar, at which the VLLE is found at T = 50°C. (Hint: make use of
the knowns to calculate the unknowns).
(d) (4) Determine the value of the Henry's Law constant of component B in A.

Added by Andrea M.

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