CHBE 321: Thermodynamics Problem Set #5
Due: October 16, 2015
1. A vessel contains 3 kg of H2O as liquid and vapor in equilibrium at 1,500kPa. If
the vapor contains 65% of the volume of the vessel, determine H and S for the 3
kg H2O.
Data from ta
CHBE 321: Thermodynamics
Problem Set #8
Due: November 13, 2015
1. A singlestage liquid/vapor separation for the benzene(1)/ethylbenzene(2) system must
produce phases of the equilibrium compositions that " = 0.35 , " = 0.775. Determine
the T and P in the
r
/
ChBE 440
OctOber 26,2012
Quiz 4
PLEASE WRITE YOUR NAME.
DOCUMENT YOUR SOLUT10N AND SHOw ALL
ORK.
1.(60 pt)The level in a tank tt can be described by the f0110n7ing diSerentiai
equatiOn
_4#=Fin 25 5
where inlet nOw rate is Fin=100m3/hr and the tank cr
ChBE 440
Quiz
October
3
14,20Il
PLEASE WRITE YOUR NAME.
DOCUMENT YOUR SOLUTiON AND SHOW ALL WORK.
1. (75 pt) A constanft$olume CSTR can be described by the following differential equation:
dcA:L,.,_cn)_kc\
dt  v\"
where ca is the concentration in the rea
ChBE 440
Final Exam
December 11th
PLEASE DOCUMENT YOUR SOLUTION AND SHOW ALL WORK.
1. Semibatch reactors are operated as a cross between batch and continuous
reactors. A semibatch reactor is initially charged with a volume of material, and a continuous fe
KtY
ANswEIl
ChBE440
Quiz6
November 30,2012
PLEASE WRITE YOUR Icfw_AME.
DOCUMEIcfw_T
YOUR SOLUTION AND SHOW ALL WORK.
1. (60pt) Consider the process
2.,*d,
=
s2+4sro
y:J_.u+
s*1*
(1)
(a) Determine asteadystate feedforward controller for the process. Show
t
ChBE 440
Quiz 3
October 9th
PLEASE DOCUMENT YOUR SOLUTION AND SHOW ALL WORK.
1. (15pt) Determine the Laplace transform of the two functions below.
(a)
(b)
ChBE 440
Quiz 3
October 9th
2. (15pt) Consider the mixing process described in the diagram below. As
Lecture 6
NMR Spectroscopy
Chem 237
February 21, 2017
Dr. Michael Funk
[email protected]
Announcements
q This week
Recrystallize Diels Alder product
Make sure you hand in sample of product for NMR analysis
q Next week
Locations for lab:
Feb. 28 in 2
Lab 1 Postlab questions:
1. Based upon your results, how effective do you think the extraction technique is for
isolating individual components from a mixture? What evidence supports your answer?
2. Describe the possible effect on your results for each o
Updated Safety Information (Spring 2017):
Approved Safety Goggles:
Students are required to purchase, and wear, regulation safety goggles for their personal use
in the laboratory. These goggles form a complete seal around all sides of the eyes and may be
Chem 237
Experiment 2 post lab questions
1. Why did we use a DeanStark trap to separate water from the reaction? Why was it okay to
add the contents of the trap (including the water) back to the reaction for the work up?
2. What is the purpose of wrappin
Chapter 3 Lectures 4, 5, 6,
Volumetric Properties of Pure Fluids
Previous Lecture:
Finished Chapter 2
First law on Open System
Next ~3 Lectures
Chapter 3 Properties of pure fluids
Phase diagrams
Pure fluids means no
PT
mixtures. We will look at
mixtu
Chapter 8 Power from Heat
Previous Lectures
Chapter 7 Thermodynamics of Flow Processes
Throttling valve
Turbine
Compressor
Pump
Nozzle
Next few Lectures
Chapter 8 Production of Power from Heat
Steam power plant (Rankine cycle, regenerative cycle)
In
Being reversible means the surroundings and system are at
equilibrium at every step along the way.
The external pressure at any point during a reversible expansion
will match the pressure inside piston/cylinder device.
ChBE 321 Thermodynamics
Lecture 1: Syllabus & Chapter 1
Professor Hyunjoon Kong
[email protected]
Syllabus
All course material will be on Compass:
https:/compass2g.illinois.edu
Discussion sections: Friday at noon or 1 pm
Attend the section you are
Lecture 2
CH2 First Law (Part 1 of 2)
Previous Lecture:
Syllabus
Any Questions?
Chapter 1:
Scope of thermodynamics: Power from Heat
System vs. surroundings
Dimensions and Units
Force, Temp, Pressure, Work
Work is path dependent
Work and Heat are forms
Lectures 14, 15,
Chapter 6 Properties of Fluids
Previous Lectures
Chapter 5 Second Law
2nd law
Entropy
Ideal, lost, real work
Next Lectures
Chapter 6 Thermodynamic properties of fluids
Property relations for homogeneous phases (6.1)
Residual propert
Where Are We?
Chapter 2
First Law
W, Q, U, H
Closed system
Mass/energy balance equation for open system
For ideal gas, Z = 1
Isothermal, isochoric, isobaric, & adiabatic processes
reversible vs. irreversible process
Chapter 3
Equations of State
(PV
Homework #5 ChBE 221 Fall 2014
Question 1
Step 1, 2, 3, 4
Step 5: Basis: 100 mol F
Step 6: Unknowns: P, x,y,z
Step 7; Mass balance on C, H, O, N from which can solve the unknowns
Step 8 and 9: Air is based on complete combustion
So, CO + O2 CO2
and CH4 +2
Homework Solution 1
ChBE 221
Problem 1
Remember that poundmole is defined as the number of entities in 12 lbm of carbon 12. One lbmol is
equal to 453.59 mol, (same as 453.59 grams per pound). Here the molecular weight of ammonia is 17 lb/lbmol (Same as
CHBE 221 Homework 3 Key. Homework due Sept 26
1) Assume Steady State and No Chemical Reactions
Degrees of Freedom= nvariables  nequations
12 variables listed (F, P, D, , , , , , , , , )
We know 5 of them (given in the problem)
There are 3 chemical specie
1. To determine whether mass balance holds under given conditions, compare mole ratios of
C/H, O/C, and O/H ENTERING AND EXITING
Basis: 100 lbmoles Product
As all of the C and H come from the inlet methane.
1
4
= at the input methane, so it should
equal a
ChBE 221 Homework #2
Problem #1
A basis of 1 kg is specified.
Problem #2
A basis of 1 kg of solution will be used for this solution
For the rate at the exit:
Problem #3
Pressure gauge must be giving a gauge pressure for this problem.
Convert the barometri
Student Name:_
TA Name or Quiz Section:_(5 pts.)
ChBE 422 Midterm # 3
May 2th, 2016
You have 50 minutes for this exam. Please do not begin until we tell you to do so.

Put your initials in the space provided on each page
You may not have a backpack, purs
CHBE 422, Mass Transfer Operations
HW #7
Due at 11:10 am, Friday, April 1st
If you make any assumptions, state them
You will need to use plotting software to make accurate graphs for several problems (Excel is
fine). You will then use these plots to solve