Imagine that a stream of fluid in steady-state flow serves as a heat source for an infinite set of Carnot engines, each of which absorbs a differential amount of heat from the fluid, causing its temperature to decrease by a differential amount, and each of which rejects a differential amount of heat to a heat reservoir at temperature T.. As a result of the operation of the Carnot engines, the temperature of the fluid decreases from Tj to T2. Equation (5.8) applies here in differential form, wherein n is defined as: n= dWldQ where Q is heat transfer with respect to the flowing fluid. Show that the total work of the Carnot engines is given by: W = Q – TAS where AS and Q both refer to the fluid. In a particular case, the fluid is an ideal gas, with Cp = (7/2)R, and the operating temperatures are T1 = 600 K and T2 = 400 K. If T, = 300 K, what is the value of W in J-mol-1? How much heat is discarded to the heat reservoir at T,? What is the entropy change of the heat reservoir? What is AStotal?
Imagine that a stream of fluid in steady-state flow serves as a heat source for an infinite set of Carnot engines, each of which absorbs a differential amount of heat from the fluid, causing its temperature to decrease by a differential amount, and each of which rejects a differential amount of heat to a heat reservoir at temperature T.. As a result of the operation of the Carnot engines, the temperature of the fluid decreases from Tj to T2. Equation (5.8) applies here in differential form, wherein n is defined as: n= dWldQ where Q is heat transfer with respect to the flowing fluid. Show that the total work of the Carnot engines is given by: W = Q – TAS where AS and Q both refer to the fluid. In a particular case, the fluid is an ideal gas, with Cp = (7/2)R, and the operating temperatures are T1 = 600 K and T2 = 400 K. If T, = 300 K, what is the value of W in J-mol-1? How much heat is discarded to the heat reservoir at T,? What is the entropy change of the heat reservoir? What is AStotal?
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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Transcribed Image Text:Imagine that a stream of fluid in steady-state flow serves as a heat source for an infinite
set of Carnot engines, each of which absorbs a differential amount of heat from the
fluid, causing its temperature to decrease by a differential amount, and each of which
rejects a differential amount of heat to a heat reservoir at temperature T. As a result of
the operation of the Carnot engines, the temperature of the fluid decreases from T to T2.
Equation (5.8) applies here in differential form, wherein n is defined as:
n = dWldQ
where Q is heat transfer with respect to the flowing fluid. Show that the total work of
the Carnot engines is given by:
W = Q – T,AS
where AS and Q both refer to the fluid. In a particular case, the fluid is an ideal gas,
with Cp = (7/2)R, and the operating temperatures are T1 = 600 K and T2 = 400 K.
If T, = 300 K, what is the value of W in J-mol-1? How much heat is discarded to the
heat reservoir at T,? What is the entropy change of the heat reservoir? What is ASotal?
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