3. The following graph of the fractional distillation is the mixture (mol/mol ratio) of ethanol-water. Answer the following questions based on the graph. a. What are the normal boiling points of ethanol and water? b. At 95°C, what is the composition in the vapor? What is the composition in liquid? c. For a mixture comprised of 50mol% ethanol and 50% water: i) at what temperature will the mixture begin to boil? ii) When the mixture begins to boil, what is the mole % ethanol in the vapor? iii) What is the boiling point of the liquid formed by condensation of the vapor from (ii) above? d. A mixture of ethanol and water of unknown molar ration is heated to boiling. Immediately, after boiling commences, a sample of the vapor is found to contain a 0.3 mole fraction of ethanol. What is the composition in mol % of the original binary mixture and what is its boiling point? e. What is the mole % of ethanol of Azrotropic Point? At is the boiling point at the azeotropic point? 3741 372 370 368 366- 364- 362 360 358 356 354 352 350 0 Pure Water Liquid Composition 0.1 Vapor-Liquid Equilibrium Mixture of Ethanol and Water Data taken from Dortmund Data Bank 0.2 Vapor Composition P=101.325 kPa 0.3 0.4 0.5 0.6 0.7 Mole Fraction of Ethanol [mol/mol] Azeotropic Point 0.8 0.9 Pure Ethanol

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3. The following graph of the fractional distillation is the mixture (mol/mol ratio) of ethanol-water.
Answer the following questions based on the graph.
a. What are the normal boiling points of ethanol and water?
b. At 95°C, what is the composition in the vapor? What is the composition in liquid?
c. For a mixture comprised of 50mol% ethanol and 50% water:
i) at what temperature will the mixture begin to boil?
ii) When the mixture begins to boil, what is the mole % ethanol in the vapor?
iii) What is the boiling point of the liquid formed by condensation of the vapor from (ii) above?
d. A mixture of ethanol and water of unknown molar ration is heated to boiling. Immediately, after
boiling commences, a sample of the vapor is found to contain a 0.3 mole fraction of ethanol. What
is the composition in mol % of the original binary mixture and what is its boiling point?
e. What is the mole % of ethanol of Azrotropic Point? At is the boiling point at the azeotropic point?
3741
372
370
368
366-
364-
362
360
358
356
354
352
350
0
Pure
Water
Liquid Composition
0.1
Vapor-Liquid Equilibrium
Mixture of Ethanol and Water
Data taken from Dortmund Data Bank
0.2
Vapor Composition
P=101.325 kPa
0.3
0.4
0.5 0.6 0.7
Mole Fraction of Ethanol [mol/mol]
Azeotropic
Point
0.8
0.9
Pure
Ethanol
Transcribed Image Text:3. The following graph of the fractional distillation is the mixture (mol/mol ratio) of ethanol-water. Answer the following questions based on the graph. a. What are the normal boiling points of ethanol and water? b. At 95°C, what is the composition in the vapor? What is the composition in liquid? c. For a mixture comprised of 50mol% ethanol and 50% water: i) at what temperature will the mixture begin to boil? ii) When the mixture begins to boil, what is the mole % ethanol in the vapor? iii) What is the boiling point of the liquid formed by condensation of the vapor from (ii) above? d. A mixture of ethanol and water of unknown molar ration is heated to boiling. Immediately, after boiling commences, a sample of the vapor is found to contain a 0.3 mole fraction of ethanol. What is the composition in mol % of the original binary mixture and what is its boiling point? e. What is the mole % of ethanol of Azrotropic Point? At is the boiling point at the azeotropic point? 3741 372 370 368 366- 364- 362 360 358 356 354 352 350 0 Pure Water Liquid Composition 0.1 Vapor-Liquid Equilibrium Mixture of Ethanol and Water Data taken from Dortmund Data Bank 0.2 Vapor Composition P=101.325 kPa 0.3 0.4 0.5 0.6 0.7 Mole Fraction of Ethanol [mol/mol] Azeotropic Point 0.8 0.9 Pure Ethanol
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