Chemical Engineering 3853
University of Utah
Fall 2011
Homework Assignment 5
Prof. Geoff Silcox
Due 2011 September 23 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounded to one sig

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 1
Prof. Geoff Silcox
Due 2011 August 26 by 16:00
Problem 1.0
The Forms of Energy
One kilogram of pure water is held at a constant pressure of 1.0 bar. The
initial tempe

10/4/2013
Ch. 9 Properties of Mixtures
Introduction
Our standard energy and entropy balances apply to
mixtures.
In Ch. 9, for a mixture with N components,
H tot H tot T , P, n1, n2 ,.
Our focus in Ch. 9 is on math for mixtures and on
calculating mixtu

10/11/2013
Ch. 10 Theory of VLE
Objectives
Develop criteria for multicomponent phase equilibrium in
terms of fugacity and chemical potential.
Calculate fugacity from an EOS.
Calculate VLE from a cubic EOS.
Why?
80 to 90 % of the separations performe

12/2/2013
Ch. 14 Reacting Systems
Topics in Ch. 14 (plus some extras)
Energy balances for reacting systems
Stoichiometry
Minimizing G and the criterion for chemical equilibrium
Equilibrium constants
Effects of immiscible solids and liquids inert dil

11/15/2013
Ch. 13 Miscibility, Solubility, Osmotic
Equilibrium
Topics in Ch. 13
Li id li id equilibrium
Liquid-liquid
ilib i
Solubility of solids in liquids
Freezing-point depression
Boiling-point elevation
Osmotic equilibrium
Applications: extract

10/23/2013
Ch. 11 Ideal Solutions
Objectives
D fi id l solution properties f V H S
Define ideal l ti
ti for V, H, S.
Obtain fugacity of a component in an ideal solution.
Revisit Raoults law.
Why?
The ideal solution model is a useful approximation.

Chemical Engineering Thermodynamics
CHEMICAL ENGINEERING 3853-001
Exam 1, Wednesday, 2011 September 28
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Problem 1.0
Air is compressed from 1 bar to 3 bar in a steady flow process. The entering air

Name: _
Chemical Engineering Thermodynamics
CHEMICAL ENGINEERING 3853-001
Exam 2, Wednesday, 2012 November 7
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Problem 1.0
A liquid, binary mixture of species 1 and 2, with x1 = 0.45, has an excess

12/1/2013
Special Topics
Outline
Equilibrium with gravitational and centrifugal forces
Application: centrifugal separations
Equilibrium with surface tension
Applications: emulsions, coatings, ink jet printers, flow in
porous media
Geof Silcox, Chemic

Name: _
Chemical Engineering Thermodynamics
CHEMICAL ENGINEERING 3853-001
Exam 3, Wednesday, 2012 December 13
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Problem 1.0
A liquid water stream contains 0.100 mol/L of NH4Cl and nothing else. The

9/14/2013
Introduction to Equilibrium
Thermodynamics
Outline
I t d ti - why study equilibrium (Ch. 1)?
Introduction h t d
ilib i (Ch
Thermodynamics of pure fluids
Equations of state and phase diagrams (Ch. 2)
Closed system energy, entropy balances (Ch.

9/14/2013
Chapter 5. Calculation of Properties
Properties we can measure
T, P, V, m, composition, heat capacities
Properties we often need
U, H, S, G
Equations of state summarize what we know about
T, P, V,
T P V and composition and allow us to calcu

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 2
Prof. Geoff Silcox
Due 2011 September 2 by 16:00
Problem 1.0
The concentration of CO2 in the Earths atmosphere is about 370 ppm. The mass
of the atmosphere is 5.14x10

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 3
Prof. Geoff Silcox
Due 2011 September 9 by 16:00
Problem 1.0
A kilogram of water is heated from 20 to 40C. Initially the water is in equilibrium
with oxygen at 1 atm

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 6
Prof. Geoff Silcox
Due 2011 October 7 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounded t

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 4
Prof. Geoff Silcox
Due 2011 September 16 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounde

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 9
Prof. Geoff Silcox
Due 2011 November 4 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounded

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 8
Prof. Geoff Silcox
Due 2011 October 28 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounded

Chemical Engineering 3853
University of Utah
Fall 2011
Solution to Homework Assignment 7
Prof. Geoff Silcox
Due 2011 October 21 by 16:00
Show all of your work and write answers to conceptual problems in complete
sentences.
Approximate answers are rounded

Chemical Engineering Thermodynamics
CHEMICAL ENGINEERING 3853-001
Sample Problems for Exam 1
Prof. Geoff Silcox
Chemical Engineering
University of Utah
Open books, homework, calculators, and notes.
1) Read each problem carefully and completely before atte

9/14/2013
Ch 6. Balances in Open Systems
6.2 Mass Balance
rate of rate of
rate of
rate of
rate of
change transport in transport out generation consumption
dM tot
mi mi
dt
in
out
m mi mi
out
tot
dM
dt
Mass in (1)
Control
C t l
volume
or system

9/18/2013
Chapter 7. Vapor-liquid Equilibrium of a
Pure Fluid
7.1 Two-phase systems
For the liquid,
For the vapor,
R
HL H iig HL
R
HV H ig HV
R
R
Hvap HV HL
7.2
R
R
Svap SV SL
7.3
Geof Silcox, Chemical Engineering, University of
Utah, Lecture 7
Cha

9/14/2013
Ch. 3 & 4 Energy and Entropy Balances in
Closed Systems
The universal balance equation for any extensive
property
t
Accumulation = transport + generation
Integrated form for some period of time:
final
initial amount amount amount amount
amou

10/30/2013
Ch. 12 Nonideal Solutions
Objectives
Obtain excess properties from experimental data.
Calculate activity coefficients using models.
Use activity coefficients to calculate VLE.
Why?
Most liquid mixtures are nonideal The design of
nonideal.