Suppose you have a mixture of 30 mol% pentane and 70 mol% hexane at 1 atm and 60oC.
If the Tbubble-point = 55.1oC, calculate the composition of vapor of the first bubble as the mixture is heated.
I found p*pentane = 1392.95 and p*hexane = 484.96 using Antoine's equation with T = 55.1.
Now I suppose I must use Raoult's law as:
yaP = xap*a(@55.1oC)
Using this I get xpentane = (0.7*760)/1392.96 = 0.382
However, the answer sheet says xpentane = 0.55.
Can anyone figure where I'm mistaken?
If the Tbubble-point = 55.1oC, calculate the composition of vapor of the first bubble as the mixture is heated.
I found p*pentane = 1392.95 and p*hexane = 484.96 using Antoine's equation with T = 55.1.
Now I suppose I must use Raoult's law as:
yaP = xap*a(@55.1oC)
Using this I get xpentane = (0.7*760)/1392.96 = 0.382
However, the answer sheet says xpentane = 0.55.
Can anyone figure where I'm mistaken?
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