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Macmillan Learning For the second method, use the Txy diagram for the ethanol-water system shown. Vapor-Liquid Equilibrium Mixture of Ethanol and Water 374 372- 370- 368- 366- 364- 36 362- T[K] 360- 358- 356- 354- 352- 350- Vapor composition Liquid composition Pure 0 0.1 0.2 0.3 0.4 0.5 0.6 P= 101.325 kPa 0.7 0.8 Mole fraction of ethanol [mol/mol] Azeotropic point 0.9 1.0 Pure ethanol

Macmillan Learning For the second method, use the Txy diagram for the ethanol-water system shown. Vapor-Liquid Equilibrium Mixture of Ethanol and Water 374 372- 370- 368- 366- 364- 36 362- T[K] 360- 358- 356- 354- 352- 350- Vapor composition Liquid composition Pure 0 0.1 0.2 0.3 0.4 0.5 0.6 P= 101.325 kPa 0.7 0.8 Mole fraction of ethanol [mol/mol] Azeotropic point 0.9 1.0 Pure ethanol

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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**Vapor-Liquid Equilibrium for Ethanol-Water System** This image presents a Txy diagram for the ethanol-water mixture, illustrating the vapor-liquid equilibrium at a pressure of 101.325 kPa. **Graph Explanation:** - **Axes:** - The x-axis represents the mole fraction of ethanol, ranging from pure water (0) to pure ethanol (1). - The y-axis represents temperature in Kelvin (K), ranging from 350 K to 374 K. - **Curves:** - The blue curve shows the liquid composition line, indicating the temperature at which a given mole fraction of ethanol in the mixture begins to vaporize. - The red curve shows the vapor composition line, indicating the temperature at which vapor of a given mole fraction of ethanol condenses. - **Azeotropic Point:** - The diagram shows the azeotropic point where the liquid and vapor compositions are identical, meaning no fractionation occurs during distillation. In this graph, it is located near a mole fraction of ethanol of approximately 0.9. The Txy diagram is essential for understanding the distillation process and the thermal properties of ethanol-water mixtures.
Transcribed Image Text:**Vapor-Liquid Equilibrium for Ethanol-Water System** This image presents a Txy diagram for the ethanol-water mixture, illustrating the vapor-liquid equilibrium at a pressure of 101.325 kPa. **Graph Explanation:** - **Axes:** - The x-axis represents the mole fraction of ethanol, ranging from pure water (0) to pure ethanol (1). - The y-axis represents temperature in Kelvin (K), ranging from 350 K to 374 K. - **Curves:** - The blue curve shows the liquid composition line, indicating the temperature at which a given mole fraction of ethanol in the mixture begins to vaporize. - The red curve shows the vapor composition line, indicating the temperature at which vapor of a given mole fraction of ethanol condenses. - **Azeotropic Point:** - The diagram shows the azeotropic point where the liquid and vapor compositions are identical, meaning no fractionation occurs during distillation. In this graph, it is located near a mole fraction of ethanol of approximately 0.9. The Txy diagram is essential for understanding the distillation process and the thermal properties of ethanol-water mixtures.
**Image Transcription for Educational Website:** 1. **Question:** According to this diagram, what is the bubble-point temperature of the 0.250 mol fraction ethanol solution? Note the requested units. **Answer Field:** T_bp = _______ °C 2. **Question:** According to this diagram, what is the mole fraction of ethanol in the vapor phase at the bubble-point temperature? **Answer Field:** y_e = _______ mol e/mol **Explanation:** This section appears to be from a worksheet or textbook on phase equilibria, specifically concerning the calculation of bubble-point temperatures and mole fractions in the vapor phase for ethanol solutions. The temperature and mole fraction should be determined with the help of a provided diagram, likely a phase diagram which is not visible in this image. These diagrams are used extensively in thermodynamics and physical chemistry to represent the equilibrium between liquid and vapor phases.
Transcribed Image Text:**Image Transcription for Educational Website:** 1. **Question:** According to this diagram, what is the bubble-point temperature of the 0.250 mol fraction ethanol solution? Note the requested units. **Answer Field:** T_bp = _______ °C 2. **Question:** According to this diagram, what is the mole fraction of ethanol in the vapor phase at the bubble-point temperature? **Answer Field:** y_e = _______ mol e/mol **Explanation:** This section appears to be from a worksheet or textbook on phase equilibria, specifically concerning the calculation of bubble-point temperatures and mole fractions in the vapor phase for ethanol solutions. The temperature and mole fraction should be determined with the help of a provided diagram, likely a phase diagram which is not visible in this image. These diagrams are used extensively in thermodynamics and physical chemistry to represent the equilibrium between liquid and vapor phases.
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