At 300 K , the vapour pressure of two pure liquid X and Y are P X o = 150 mmHg and P Y o = 300 mmHg respectively. A liquid mixture is prepared with 2 mole of X and 3 moles of Y . Calculate the tot

Question

At 300 K , the vapour pressure of two pure liquid X and Y are $P_{X}^{o} = 150 mmHg$ and $P_{Y}^{o} = 300 mmHg$ respectively. A liquid mixture is prepared with 2 mole of X and 3 moles of Y .

Calculate the total pressure at the bubble point and if pressure is gradually reduced at constant temperature then calculate total pressure dew point (the moment the last trace of liquid remains)

TestHub · Accepted Answer

P b u bb l e ​ = ( x x ​ ⋅ P x ∘ ​ ) + ( x y ​ ⋅ P y ∘ ​ ) P b u bb l e ​ = ( 0.4 ⋅ 150 ) + ( 0.6 ⋅ 300 ) P b u bb l e ​ = 60 + 180 P b u bb l e ​ = 240 mm P d e w ​ 1 ​ = P x ∘ ​ y x ​ ​ + P y ∘ ​ y y ​ ​ P d e w ​ 1 ​ = 150 0.4 ​ + 300 0.6 ​ P d e w ​ 1 ​ = 0.002667 + 0.002 = 0.004667 P d e w ​ = 0.004667 1 ​ P d e w ​ ≈ 214.29 mm

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