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What is the change in entropy of 1lbmol of an ideal gas which is initially at 120°F and 10 atm pressure is expanded irreversibly to 1 atm and 70°F?

What is the change in entropy of 1lbmol of an ideal gas which is initially at 120°F and 10 atm pressure is expanded irreversibly to 1 atm and 70°F?

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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What is the change in entropy of 1lbmol of an ideal gas which is initially at 120°F and 10 atm pressure is expanded irreversibly to 1 atm and 70°F? The molar heat capacity at constant pressure is 7 Btu/lbmol°F.
A. 4.58
B. 3.95
C. 0.63
D. 0

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