1-
Concentrated binary solution containing mostly species 2 (but x= 0.10 bar. 2 ≠ 1)
is in equilibrium with a vapor phase containing both species 1 and 2. The pressure
of this two-phase system is 1 bar; the temperature is 298.0K. Determine from the
following data good estimates of x1 and y1. H1= 200 bar; P2 sat = 0.1 bar.
2-
What is the composition of the vapor that is in phase equilibrium at 300 K with a
binary, non-ideal liquid mixture for which x1=0.4? At 300 K, the saturation
pressure are 0,7 atm for component 1 and 0,2 atm for component 2. Use the
single-component Margules equation A=2 to model the non-ideal liquid.
3-
A vapor that is 65 mol% benzene and 35 mol% toluene is in equilibrium with a
liquid mixture of the same two spiecs. The absolute pressure in the system is 150
mm Hg. Estimate the composition of the liquid and the system temperature?
4-
For binary system at 50 C and 1.4 bar, the mole fractions of component 1 in the
liquid phase is 0.4, and the vapor phase 0.7. The saturation pressures at 50 C are
P1sat=1 bar and P2sat =1.2 bar. What vapor phase composition would be in
equilibrium at 50 C with a liquid whose mole fraction of component 1 is 0.8?
5-
A binary vapor phase mixture is to be compressed at fixed temperature until the
vapor completely condenses. The vapor contains 30 mol% of component 1 and 70
mol% of component 2. The saturation pressures at the temperature of the system
are 0.82 bar and 1.93 bar, respectively. If is also known, that the bubble pressure
of 50:50 mixture of components 1 and 2 is 1.08 bar.
Estimate the pressure required to completely liquefy the 30:70 mixture, assuming
that the excess Gibbs free energy of the liquid is modeled by the one-parameter
Margules equation.
6-
Calculate the bubble temperature for a binary system Acetone(1)/ Methanol(2).
The mole fraction of component 1 in the liquid phase is 0.4 and the pressure is 70
kPa. Saturation pressures are according to Antoine, where T in C and P in kPa.
The liquid phase is non-ideal and its activity coefficient can be determined by
using Margules equation. A=0,708 and B=0,69