Hustak graphicaly the posithie & negatire deniation from ideat behariour of binary- mixtures nsing T against X plot.

Fundamentals Of Analytical Chemistry
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Chapter7: Statistical Data Treatment And Evaluation
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Problem 7.16QAP
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U.4 A. 1-6 part 2

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1.3.3.2 Liquid-gas mixtures (azeotropic system)
The diagram below shows the characteristic T vs x graph were favorable
interactions between molecules in the mixture reduce the vapor
Vapour
composition
pressure
below
the
ideal
value,
e.g.
propanone/trichloromethane and nitric acid/water mixtures.
This produces a high boiling azeotrope than the pure
Boiling
temperature
of liquid
components. In this type of mixture, the one left in the still
after fractional distillation would be the azeotropic mixture. If
azeotropic concentration of the mixture is distilled no
b
separation of components would occur because the liquid and
Mole fraction of A, zA
vapor would have the same concentration.
Formation of low-boiling azeotrope is attained when the components in the mixture
have unfavorable interactions, e.g. dioxane/water and
ethanol/water. In this type of mixture, fractional distillation of
Vapour
composition
a mixture with starting concentration given by pt. a in the
diagram would yield an azeotropic distillate. This is what
Boiling
temperature
of liquid
happens when fermented sugar cane syrup is fractionally
distilled, an azeotropic mixture containing 95%(v/v) alcohol is
obtained.
b
Mole fraction of A, ZA
Temperature, T
la
Temperature, T
Transcribed Image Text:1.3.3.2 Liquid-gas mixtures (azeotropic system) The diagram below shows the characteristic T vs x graph were favorable interactions between molecules in the mixture reduce the vapor Vapour composition pressure below the ideal value, e.g. propanone/trichloromethane and nitric acid/water mixtures. This produces a high boiling azeotrope than the pure Boiling temperature of liquid components. In this type of mixture, the one left in the still after fractional distillation would be the azeotropic mixture. If azeotropic concentration of the mixture is distilled no b separation of components would occur because the liquid and Mole fraction of A, zA vapor would have the same concentration. Formation of low-boiling azeotrope is attained when the components in the mixture have unfavorable interactions, e.g. dioxane/water and ethanol/water. In this type of mixture, fractional distillation of Vapour composition a mixture with starting concentration given by pt. a in the diagram would yield an azeotropic distillate. This is what Boiling temperature of liquid happens when fermented sugar cane syrup is fractionally distilled, an azeotropic mixture containing 95%(v/v) alcohol is obtained. b Mole fraction of A, ZA Temperature, T la Temperature, T
Queetion #z
caly the gosthie & l
Illustrate graphic
behavieurof binary
the positrie &
negatire deñation from icdea
mixtures using T against X plot.
Transcribed Image Text:Queetion #z caly the gosthie & l Illustrate graphic behavieurof binary the positrie & negatire deñation from icdea mixtures using T against X plot.
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