Chemical Engineering > GATE 2014 > Vapor-Liquid Equilibrium
Consider a binary liquid mixture at equilibrium with its vapour at 25°C. Antoine equation for this system is given as log10pisat=A-B/(t+C) where t is in °C and p in Torr. The Antoine constants (A, B, and C) for the system are given in the following table.
The vapour phase is assumed to be ideal and the activity coefficients (γi) for the non-ideal liquid phase are given by
ln(γ1)=x22[2-0.6x1]
ln(γ2)=x12[1.7+0.6x2]
If the mole fraction of component 1 in liquid phase (x1) is 0.11, then the mole fraction of component 1 in vapour phase (y1) is
| Component | A | B | C |
|---|---|---|---|
| 1 | 7.0 | 1210 | 230 |
| 2 | 6.5 | 1206 | 223 |
The vapour phase is assumed to be ideal and the activity coefficients (γi) for the non-ideal liquid phase are given by
ln(γ1)=x22[2-0.6x1]
ln(γ2)=x12[1.7+0.6x2]
If the mole fraction of component 1 in liquid phase (x1) is 0.11, then the mole fraction of component 1 in vapour phase (y1) is
Correct : 0.70
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