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Vapor-Liquid Equilibrium
GATE 2017
Hard
A sparingly soluble gas is in equilibrium with a solvent at 10 bar; solvent mole fraction in the gas phase is 0.01. Fugacity coefficient of the solute (gas phase)=0.92, Henry's constant=1000 bar. Liquid obeys Henry's law. The mole PERCENTAGE of solute in the liquid phase, rounded to 2 decimal places, is
0.91 %(± 0.03 accepted)
Explanation
y_solute=1−0.01=0.99. f_solute(gas)=y×φ×P=0.99×0.92×10=9.108 bar. x_solute=f/H=9.108/1000=0.009108=0.91%.
Source: GATE CH 2017 (2017)
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