Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)
1st Edition
ISBN: 9781111580704
Author: Kevin D. Dahm, Donald P. Visco
Publisher: Cengage Learning
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Question
Chapter 1.6, Problem 2E
A)
Interpretation Introduction
Identify the type of the system for the following statement:
“While a car is being driven with the windows rolled up, is the system open or closed? Which, if any, of these apply: isolated, isochoric, isothermal, isobaric, adiabatic?”
B)
Interpretation Introduction
Identify the type of the system for the following statement:
“While a car is sitting in a garage, with no passengers inside, all windows rolled up and the engine not running, is the system open or closed? Which, if any, of these apply: isolated, isochoric, isothermal, isobaric, adiabatic?”
C)
Interpretation Introduction
Explain a process where car is considered as closed system.
D)
Interpretation Introduction
Explain a process where car is considered as open system.
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A liquid mixture of benzene and toluene containing 52.0 wt% benzene at 100.0 °C and pressure Po atm is fed at a rate of 32.5 m³/h into
a heated flash tank maintained at a pressure Ptank
Material Balances
Correct.
0.67/1
===
Attempts: 1 of 5 used
Calculate Ptank (atm), the mole fraction of benzene in the vapor, and the molar flow rates of the liquid and vapor products.
Ptank
.544
atm
Ybz
.657
mol benzene/mol vapor product
nvapor
55.8
mol/s
nliquid
37.6
mol/s
Hint
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Energy Balance
Check heat capacities.
Calculate the required heat input rate in kilowatts. i
0.447
kW
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Homework 8
A stream of pure cyclopentane vapor flowing at a rate of 1650 L/s at 190.0°C and 1 atm enters a cooler in which 50.0% of the feed is
condensed at constant pressure.
Question 4 of 5
Correct
What is the temperature at the condenser outlet?
49.3
°℃
eTextbook and Media
Hint
Enthalpy Table
Your Answer Correct Answer (Used)
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E
Attempts: 1 of 5 used
Prepare and fill in an inlet-outlet enthalpy table. Use a reference state of liquid cyclopentane at the boiling point.
In
T = 190.0°C
Out
T=49.3°C
Substance
n (mol/s)
Ĥ (kJ/mol) n (mol/s)
Ĥ (kJ/mol)
C5H10(1)
0.0
21.708
0.0
C5H10(V) 43.416
43.687
21.708
27.30
Heat
Check significant figures and sign.
Calculate the required cooling rate (a positive number).
! kW
Hint
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A liquid mixture of benzene and toluene containing 52.0 wt% benzene at 100.0 °C and pressure Po atm is fed at a rate of 32.5 m³/h into
a heated flash tank maintained at a pressure Ptank
Your answer is partially correct.
1.312
atm
Assistance Used
0.58/1
Calculate Ptank (atm), the mole fraction of benzene in the vapor, and the molar flow rates of the liquid and vapor products.
Ptank
i
atm
.657
Ybz
mol benzene/mol vapor product
nvapor
55.8
mol/s
nliquid
37.6
mol/s
Hint
GO Tutorial
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Energy Balance
Calculate the required heat input rate in kilowatts. i
kW
GO Tutorial
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Chapter 1 Solutions
Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)
Ch. 1.6 - Prob. 1ECh. 1.6 - Prob. 2ECh. 1.6 - Prob. 3ECh. 1.6 - Prob. 4ECh. 1.6 - Prob. 5ECh. 1.6 - Prob. 6ECh. 1.6 - Prob. 7ECh. 1.6 - Prob. 8ECh. 1.6 - Prob. 9ECh. 1.6 - Prob. 10E
Ch. 1.6 - Prob. 11ECh. 1.6 - Prob. 12ECh. 1.6 - Prob. 13ECh. 1.6 - Prob. 14ECh. 1.6 - Prob. 15ECh. 1.7 - Prob. 16PCh. 1.7 - Prob. 17PCh. 1.7 - Prob. 18PCh. 1.7 - Prob. 19PCh. 1.7 - Prob. 20PCh. 1.7 - Prob. 21PCh. 1.7 - Prob. 22PCh. 1.7 - Prob. 23PCh. 1.7 - Prob. 24PCh. 1.7 - Prob. 25PCh. 1.7 - Prob. 26PCh. 1.7 - Prob. 27PCh. 1.7 - Prob. 28PCh. 1.7 - Prob. 29PCh. 1.7 - Prob. 30PCh. 1.7 - Prob. 31PCh. 1.7 - Prob. 32P
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