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3. Use the Txy and Pxy phase diagrams for benzene-toluene to answer the questions that follow. Benzene (1)- Toluene (2) Txy at 1 bar (760 mmHg) Benzene (1) – Toluene (2) Pxy at 293 K (mmHg) 04 06 02 00 02 08 10 00 04 06 08 X, or y. X1 or y1 a. What is the phase(s) of an overall 20% toluene, 80% benzene mixture at 293 K and 30 mmHg, and if two phases are present, what is their composition? What is the highest temperature at which a 60% toluene, 40% benzene vapor would begin to condense at 1 bar (760 mmHg)? b. An 80% benzene, 20% toluene liquid mixture is heated at 1 bar (760 mmHg) in a closed piston chamber. What will be the temperature when the last drop of liquid is vaporized? c. A piston operating at a constant temperature of 293 K is initially filled with a liquid containing 80 moles of benzene and 120 moles of toluene. The volume of the piston is expanded until the pressure inside the piston is 35 mmHg. What will be the phase(s) of the mixture, and if two phases are present, how many moles of each species are in each phase? 06 08

3. Use the Txy and Pxy phase diagrams for benzene-toluene to answer the questions that follow. Benzene (1)- Toluene (2) Txy at 1 bar (760 mmHg) Benzene (1) – Toluene (2) Pxy at 293 K (mmHg) 04 06 02 00 02 08 10 00 04 06 08 X, or y. X1 or y1 a. What is the phase(s) of an overall 20% toluene, 80% benzene mixture at 293 K and 30 mmHg, and if two phases are present, what is their composition? What is the highest temperature at which a 60% toluene, 40% benzene vapor would begin to condense at 1 bar (760 mmHg)? b. An 80% benzene, 20% toluene liquid mixture is heated at 1 bar (760 mmHg) in a closed piston chamber. What will be the temperature when the last drop of liquid is vaporized? c. A piston operating at a constant temperature of 293 K is initially filled with a liquid containing 80 moles of benzene and 120 moles of toluene. The volume of the piston is expanded until the pressure inside the piston is 35 mmHg. What will be the phase(s) of the mixture, and if two phases are present, how many moles of each species are in each phase? 06 08

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
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3. Use the Txy and Pxy phase diagrams for benzene-toluene to answer the questions that follow. Benzene (1) – Toluene (2) Txy at 1 bar (760 mmHg) Benzene (1) – Toluene (2) Pxy at 293 K (mmHg) 00 0.2 04 0.6 0.8 1.0 00 02 04 06 0.8 1.0 X, or y, X1 or y1 a. What is the phase(s) of an overall 20% toluene, 80% benzene mixture at 293 K and 30 mmHg, and if two phases are present, what is their composition? What is the highest temperature at which a 60% toluene, 40% benzene vapor would begin to condense at 1 bar (760 mmHg)? b. An 80% benzene, 20% toluene liquid mixture is heated at 1 bar (760 mmHg) in a closed piston chamber. What will be the temperature when the last drop of liquid is vaporized? c. A piston operating at a constant temperature of 293 K is initially filled with a liquid containing 80 moles of benzene and 120 moles of toluene. The volume of the piston is expanded until the pressure inside the piston is 35 mmHg. What will be the phase(s) of the mixture, and if two phases are present, how many moles of each species are in each phase? (ɔ.) I 105 110
Transcribed Image Text:3. Use the Txy and Pxy phase diagrams for benzene-toluene to answer the questions that follow. Benzene (1) – Toluene (2) Txy at 1 bar (760 mmHg) Benzene (1) – Toluene (2) Pxy at 293 K (mmHg) 00 0.2 04 0.6 0.8 1.0 00 02 04 06 0.8 1.0 X, or y, X1 or y1 a. What is the phase(s) of an overall 20% toluene, 80% benzene mixture at 293 K and 30 mmHg, and if two phases are present, what is their composition? What is the highest temperature at which a 60% toluene, 40% benzene vapor would begin to condense at 1 bar (760 mmHg)? b. An 80% benzene, 20% toluene liquid mixture is heated at 1 bar (760 mmHg) in a closed piston chamber. What will be the temperature when the last drop of liquid is vaporized? c. A piston operating at a constant temperature of 293 K is initially filled with a liquid containing 80 moles of benzene and 120 moles of toluene. The volume of the piston is expanded until the pressure inside the piston is 35 mmHg. What will be the phase(s) of the mixture, and if two phases are present, how many moles of each species are in each phase? (ɔ.) I 105 110
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The graphs are given for the benzene (1) – toluene (2) system at 1 bar and 293 K are:

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