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A mixture with a 50:50 molar ratio of n-pentane and isopentane (i-pentane) is contained in a sealed vessel. Initially the mixture is entirely a liquid at a very high pressure and a temperature of 115°C. While maintaining the temperature constant at 115°C, the system pressure is steadily decreased. Clearly stating all assumptions, please calculate the approximate values of: a. The pressure when the first bubble of vapour is formed. b. The composition of the first bubble of vapour. C. The pressure at which the last drop of liquid is vapourized. d. The composition of the last drop of liquid.

A mixture with a 50:50 molar ratio of n-pentane and isopentane (i-pentane) is contained in a sealed vessel. Initially the mixture is entirely a liquid at a very high pressure and a temperature of 115°C. While maintaining the temperature constant at 115°C, the system pressure is steadily decreased. Clearly stating all assumptions, please calculate the approximate values of: a. The pressure when the first bubble of vapour is formed. b. The composition of the first bubble of vapour. C. The pressure at which the last drop of liquid is vapourized. d. The composition of the last drop of liquid.

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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4. A mixture with a 50:50 molar ratio of n-pentane and isopentane (i-pentane) is contained in a sealed vessel. Initially the mixture is entirely a liquid at a very high pressure and a temperature of 115°C. While maintaining the temperature constant at 115°C, the system pressure is steadily decreased. Clearly stating all assumptions, please calculate the approximate values of: a. The pressure when the first bubble of vapour is formed. b. The composition of the first bubble of vapour. C. The pressure at which the last drop of liquid is vapourized. d. The composition of the last drop of liquid.
Transcribed Image Text:4. A mixture with a 50:50 molar ratio of n-pentane and isopentane (i-pentane) is contained in a sealed vessel. Initially the mixture is entirely a liquid at a very high pressure and a temperature of 115°C. While maintaining the temperature constant at 115°C, the system pressure is steadily decreased. Clearly stating all assumptions, please calculate the approximate values of: a. The pressure when the first bubble of vapour is formed. b. The composition of the first bubble of vapour. C. The pressure at which the last drop of liquid is vapourized. d. The composition of the last drop of liquid.
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