Hesss Law
The heat change in a chemical reaction carried out at constant P is
the same whether it is carried out in one or several steps.
1
A
B
2
X
5
3
4
Y
Z
H1 = H2 + H3 + H4 + H5
Example: Calculate the enthalpy change when 1 mole of maltose
is converted
CHM2132 Midterm Wednesday October 28th, 2009
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Write all the formulas that you use to solve the questions and show all your work.
Marks will be deducted if uni
Fall 2010 CHM 2132 Midterm
Name:
1/9
Student Number:
CHM 2132
Midterm Test, October 22nd 2010
This is a closed book exam with no notes allowed.
Calculators are permitted.
Write all the formulas that you use to solve the questions and show all
your work.
R
Do you have your account?
While you are waiting for class to start, set up your wireless
device with LectureTools by going to:
https:/my.lecturetools.com/l/483408
You should see this question:
True or False: The partial pressure of oxygen in an air-filled
While you are waiting for class to
start, log into the LectureTools site
for todays class at:
https:/my.lecturetools.com/l/483409
And answer the following
question
p-V graphs for 1 mole of an ideal gas is shown above. Identify the true
statement that can
CHM2131A/CHM2132A Test 1: Friday October 1st, 2004
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Show all your work.
Remember to include units in all your calculations. Marks will be deducted if units ar
LAST Name: _
FIRST Name: _
Student #: _
CHM2132 Midterm #2
Fall 2013
This is a closed book exam with no notes allowed. Non-graphing, non-programmable calculators are permitted.
An equation sheet is provided on the last page. You may rip this page off of t
CHM2132 - Chapter 3
1
In thermodynamics we usually want to know how the
state of a system will change if one of the variables
that describe that state is changed.
Derivatives are a mathematical tool that is very useful
to analyze how changes in one prop
Thermochemistry
http:/www.nearing-zero.net
1
- The study of the heat produced/absorbed by a
chemical reaction
Thermochemical Properties
Any chemical process involving heat transfer
Standard Conditions
1 bar (105 Pa)
298.15K (standard ambient T)
Standard S
Entropy
1
First law allows us to quantitate the energy transfer
involved in a process
Does not tell us whether or not it will occur
spontaneously
Suppose a gas is allowed to expand into an
empty chamber:
If the gas has ideal behavior
Entropy
U = 0
2
T
Which statement is correct?
For an isothermal chemical reaction run at constant pressure:
a) URo is always equal to HRo.
b) URo is sometimes equal to HRo.
c) URo is never equal to HRo.
To text in your answer, send
'1335142 A,B,etc' to (613) 699-8734
Gibbs
1
http:/mysite.science.uottawa.ca/ngoto/Welcome.html
3
Post your question in the Discussion Board
of the CHM2132 site in Blackboard Learn.
uottawa.blackboard.com
Questions may be answered by:
1) By your fellow students
2) A T.A.
3) Prof. Goto (who will al
https:/my.lecturetools.com/l/483411
Suppose we have 2 containers of equal volume at 298 K connected to each
other by a glass tube separated by a stopcock. The stopcock is then turned
to allow two ideal gases to mix. Assuming that the temperature of this
p
Select the true statement.
a) If q > 0 then the temperature of the system must
increase.
b) U for a system will be the same if I transfer 1 kJ of heat
into this system under constant volume conditions or
non-constant volume conditions.
c) The larger the h
Based on course material covered up to the end of class on Friday
Oct. 9th (up to end of Chapter 4)
Seat assignments will be posted on Thursday Check gradebook for your seat assignment before you arrive!
75 min (we will end at 3:45 pm)
Equation sheet
MasteringChemistry Assignment #3, due before
class next Wednesday!
Question while you wait for class to start:
What is the work of a reversible adiabatic compression?
a)
"V %
nRT ln $ 2 '
$V '
# 1&
b)
pext V
c)
CV T
https:/my.lecturetools.com/
l/483411
A review question to consider while we wait for class to start:
A pot containing liquid water at 278 K (the system) is placed
on a stovetop which is turned on for a long enough time that
the water begins to boil. Which of the following statements is
true?
At the end of last class we were trying to find the standard reaction
enthalpy for:
C6H6(l) + 3H2(g) C6H12(l)
Given the following data:
Hocombustion (C6H6(g)
= -3302 kJ/mol
Hocombustion(C6H12(l) = -3920 kJ/mol
Hof(H2O(l)
= -285.8 kJ/mol
o
H vap(C6H6(l) =
https:/my.lecturetools.com/l/341821
We saw last class that entropy is defined as:
qrev
S =
T
And that we must always find the reversible path to
calculate entropy.
So do you think that all adiabatic processes will have
S = 0?
A) Yes, this seems reasonab
Rank from highest to lowest entropy:
1)
2)
3)
4)
5)
6)
1 mol of argon gas at 273 K, 40 L
1 mol of argon gas at 273 K, 20 L
mol of liquid argon at 100 K
mol of argon gas at 100 K, 20 L
1 mol of CF4 gas at 273 K, 40 L
mol of argon gas at 273 K, 20 L
Rank
Introduction
The purpose of this experiment was to study the different methods of forming polymers
and to understand the reaction of radicals. Polymers are macromolecules that are formed from
smaller molecules called monomers, which bind together with a c
Introduction
The purpose of this lab was to better understand the mechanism of Sn1 and Sn2
reactions through their difference in kinetics, type of leaving group and solvent. Kinetics is
defined as the study of the forces acting upon a mechanism of a react
INTRODUCTION
In an ideal situation, a reaction will yield only one product, which rarely ever happens.
This leads to two products: minor and major, which is the one that scientists are interested in.
These products are formed via two mechanisms, eliminati
Blame the 1st Law of Thermodynamics
1
Our first thermodynamic variable:
Internal Energy
U
Energy of the sum of translational, vibrational,
rotational, bonding and non-bonding energies
It is not possible to know absolute value of U
e.g. internal
energy o
CHM2132 Midterm 1
Friday October 3rd, 2014
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Show all your work.
Remember to include units in all your calculations.
Marks will be deducted if units are not sh
CHM2132 Test 1: Wednesday October 5th, 2011
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Show all your work.
Remember to include units in all your calculations.
Marks will be deducted if units are not s
CHM2132 Midterm 2
Friday November 14th, 2014
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Show all your work.
Remember to include units in all your calculations.
Marks will be deducted if units are not
CHM 2132 Final Exam
Name: _
Student number:_
Professor: N. Goto
Date: December 14th, 2007.
Time: 3 hours
This is a closed book exam with no notes allowed.
Calculators are permitted.
Write all the formulas that you use to solve the questions and show all y
CHM2132 Midterm 1
Friday October 9th, 2015
Name: _
Student #: _
This is a closed book exam with no notes allowed.
Calculators are permitted.
Show all your work.
Remember to include units in all your calculations.
Marks will be deducted if units are not sh