Principles of Sociology
SOC1101F
Sam Alvaro
Winter 2016 Take Home Exam
This Take Home Exam is worth 30% of your final grade and is due March 29 th, via
blackboard by 11:59PM. The exam will be based on all the material presented in class
and the assigned r
Chemical Equilibrium
1
In chemistry, the question that is often being asked is
whether a chemical reaction will occur spontaneously.
What does this mean?
- you do not have to do any work in order for the process
to occur
- the process is irreversible
How
1
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 also moderate for accuracy)
Discussion Boards can also
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
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
MasteringChemistry Assignment #2, due before
class next Friday!
Question while you wait for class to start:
What is the work of a reversible adiabatic compression?
a)
"V %
nRT ln $ 2 '
# V1 &
b)
pext V
c)
CV T
d) Both a) and c) can be used.
e) Both b) a
To solve this question it is necessary to:
a) Integrate
To text in your answer,
b) Find the derivative
send SLK A,B,etc' to (613)
777-0647
Midterm: Friday Oct 7th in class on Chapters 1 4
Next weeks DGDs: Post requests for questions to be covered in
Therm
Lipid raft
formation is
described
by phase
diagrams.
https:/youtu.be/kDsFP67_ZSE
Phase Diagrams
https:/www.researchgate.net/figure/262000641_fig1_Fig-1-Phase-diagram-of-the-DOPGeSMChol-ternary-mixture-obtained-from-confocal-laser
1
Recall that is chemical
Last class we were introduced to a thermodynamic
definition for constant volume heat capacity:
" U %
CV = $
'
# T &V
This came from the general equation describing how U changes
with T and V:
" U %
" U %
dU = $
' dV + $
' dT
# V &T
# T &V
If we allow V to
a)
b)
To text in your answer,
send ULJ A,B,etc' to
(613) 777-0647
Justification of your
answer is required.
c)
a)
b)
c)
35
U and H are state functions we can choose any path to
calculate U and H
If heat capacity for a material is known and we know the
te
13
- How much you do depends on how you do it.
- We will look at 3 cases of compression of an ideal gas
from the same Vi and Vf
- What happens to work?
Vi
Vf
14
- Pressure goes up very quickly
- Volume decreases until new equilibrium is reached
15
- Add f
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: a mathematical method that is very useful
to understand how changes in one pr
- The study of the
heat produced/
absorbed by a
chemical
reaction
Thermochemistry
http:/www.nearing-zero.net
1
The difference between the enthalpy of the initial state
(the reactants) and the final state (the products) under
constant pressure where T of i
2 new ways to evaluate for spontaneity:
A = U T S
Conditions for
spontaneity?
Work equivalency?
Gibbs energy changes with pressure:
! G "
$
% =V
& p 'T
Note: Mastering Chemistry Assignment due on Friday!
G = H T S
Now we expect a large volume change with
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