Heat exchanger n =n, mol/s acetone = 1 atm T L/s acetone mol/s acetone = 1 atm =n, mol/s water n, mol/s water = 1 atm P, = 1 atm T, mperature does acetone enter the heat exchanger?

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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Question
8
Saturated acetone vapor enters a heat exchanger at a rate of V1 = 8.20 L/s at P1 = 1 atm and emerges from the heat exchanger
as a saturated liquid at the same pressure. Water at P3 = 1 atm enters the heat exchanger at T3 = 16.0 °C and at a rate of
nz = 5.92 mol/s. Assume that the heat exchanger operates adiabatically with respect to its surroundings. Calculate the
temperature of exiting water, T4, by following these steps.
Heat exchanger
V, L/s acetone
n, = n, mol/s acetone
n, mol/s acetone
P, = 1 atm
P, = 1 atm
T,
T,
n, = n, mol/s water
n, mol/s water
P, = 1 atm
Р.3 1 atm
T
T,
At what temperature does acetone enter the heat exchanger?
T1 =
°C
What is the heat of vaporization of acetone at this temperature?
heat of vaporization:
kJ/mol
Use the ideal gas law to calculate the moles of acetone entering the heat exchanger.
n] =
mol/s
Assume that the heat capacity of water for the temperature range in the heat exchanger is constant at
Cn = 7.54 x 10-2kJ/(mol-°C). What is the temperature of water leaving the heat exchanger?
T4 =
°C
Transcribed Image Text:Saturated acetone vapor enters a heat exchanger at a rate of V1 = 8.20 L/s at P1 = 1 atm and emerges from the heat exchanger as a saturated liquid at the same pressure. Water at P3 = 1 atm enters the heat exchanger at T3 = 16.0 °C and at a rate of nz = 5.92 mol/s. Assume that the heat exchanger operates adiabatically with respect to its surroundings. Calculate the temperature of exiting water, T4, by following these steps. Heat exchanger V, L/s acetone n, = n, mol/s acetone n, mol/s acetone P, = 1 atm P, = 1 atm T, T, n, = n, mol/s water n, mol/s water P, = 1 atm Р.3 1 atm T T, At what temperature does acetone enter the heat exchanger? T1 = °C What is the heat of vaporization of acetone at this temperature? heat of vaporization: kJ/mol Use the ideal gas law to calculate the moles of acetone entering the heat exchanger. n] = mol/s Assume that the heat capacity of water for the temperature range in the heat exchanger is constant at Cn = 7.54 x 10-2kJ/(mol-°C). What is the temperature of water leaving the heat exchanger? T4 = °C
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