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The Raoult's Law states that the vapor pressure of a solute (P;) is equal to the molar fraction of a chemical species (x) multiplied by the pure component vapor pressure (P) of that chemical species: P = x,P; For a binary system, there only two components in the liquid and in the gas phases. Thus: P, = P. P Vi = = x:- Pr Yi = 1.0 Pr For water/ethanol system (ethanol is 40% wt), calculate the f a. Partial pressure of water and ethanol; b. Molar fraction of ethanol and water in the gas phase; c. If we have a gas with the same composition with the vapor above the liquid as the mentioned binary system, held at a constant temperature of 35°C, calculate the pressure in which the gas starts to condense.

The Raoult's Law states that the vapor pressure of a solute (P;) is equal to the molar fraction of a chemical species (x) multiplied by the pure component vapor pressure (P) of that chemical species: P = x,P; For a binary system, there only two components in the liquid and in the gas phases. Thus: P, = P. P Vi = = x:- Pr Yi = 1.0 Pr For water/ethanol system (ethanol is 40% wt), calculate the f a. Partial pressure of water and ethanol; b. Molar fraction of ethanol and water in the gas phase; c. If we have a gas with the same composition with the vapor above the liquid as the mentioned binary system, held at a constant temperature of 35°C, calculate the pressure in which the gas starts to condense.

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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The Raoult's Law states that the vapor pressure of a solute (P;) is equal to the molar fraction of a chemical species (x;) multiplied by the pure component vapor pressure (P) of that chemical species: P = x;P For a binary system, there only two components in the liquid and in the gas phases. Thus: P P Yi = = X Pr Pr = P Y; = 1.0 i For water/ethanol system (ethanol is 40% wt), calculate the ff a. Partial pressure of water and ethanol; b. Molar fraction of ethanol and water in the gas phase; If we have a gas with the same composition with the vapor above the liquid as the mentioned binary system, held at c. a constant temperature of 35°C, calculate the pressure in which the gas starts to condense.
Transcribed Image Text:The Raoult's Law states that the vapor pressure of a solute (P;) is equal to the molar fraction of a chemical species (x;) multiplied by the pure component vapor pressure (P) of that chemical species: P = x;P For a binary system, there only two components in the liquid and in the gas phases. Thus: P P Yi = = X Pr Pr = P Y; = 1.0 i For water/ethanol system (ethanol is 40% wt), calculate the ff a. Partial pressure of water and ethanol; b. Molar fraction of ethanol and water in the gas phase; If we have a gas with the same composition with the vapor above the liquid as the mentioned binary system, held at c. a constant temperature of 35°C, calculate the pressure in which the gas starts to condense.
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