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What is the entropy change for a 5.00 molar Ar gas expanding reversibly at T=298K from a pressure of 10.00 atm to 1.00 atm?

What is the entropy change for a 5.00 molar Ar gas expanding reversibly at T=298K from a pressure of 10.00 atm to 1.00 atm?

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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a. What is the entropy change for a 5.00 molar Ar gas expanding reversibly at T = 298K from a pressure of 10.00 atm to 1.00 atm? b. What is the entropy change for the same 5.00 molar Ar gas changing from its initial (T = 298K P = 10.00 atm) but doing it in two steps: first, a reversible adiabatic cooling expansion leading to an intermediate T = 118.6K, followed by irreversible heating up of the gas at constant pressure to reach the same final conditions as in part a? c. Use some wording to explain the comparison of the entropy change for both processes and the comparison of the heat exchange in both cases.
Transcribed Image Text:a. What is the entropy change for a 5.00 molar Ar gas expanding reversibly at T = 298K from a pressure of 10.00 atm to 1.00 atm? b. What is the entropy change for the same 5.00 molar Ar gas changing from its initial (T = 298K P = 10.00 atm) but doing it in two steps: first, a reversible adiabatic cooling expansion leading to an intermediate T = 118.6K, followed by irreversible heating up of the gas at constant pressure to reach the same final conditions as in part a? c. Use some wording to explain the comparison of the entropy change for both processes and the comparison of the heat exchange in both cases.
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