Mass flows and specific heat capacity and inlet and outlet temperature for the flows in a heat exchanger are given. Assume that no heat transfer to the surroundings takes

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
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Exercise 1 Entropy change in a heat exchanger

Mass flows and specific heat capacity and inlet and outlet temperature for the flows in a heat exchanger are given. Assume that no heat transfer to the surroundings takes place. Calculate the entropy change in the heat exchanger. Calculate the enthalpy change in the heat exchanger. What is the entropy change in the surroundings? What is the entropy change in the universe? Give the answers in kW/K.

?̇?=5.0kg/s         ??,?=1500J/K*kg       ??,??=293K        ??,out=315K       

?̇ℎ=3.0kg/s         ??,?=1200J/K*kg       ?ℎ,??=343K        ?ℎ,out=297K

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The system and the entropy change of the Universe

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