Midterm Exam #1
CHEM 3321
September 28, 2015
Name:
Please PRINT your name clearly.
1. Please read all instructions on this page.
2. Problems 1 and 2: 33 points total
MARK the box ( ) that corresponds to the best answer.
Any work shown will be considered
Problem Session #6 Problems 1. Using the Claperon equation determine if a 60 kg man whose skates contact the ice with an area of 0.1 cm2 would be able to skate in -3 oC weather? (b) What weight person would not be able to skate under these conditions? (c)
Questions on Concepts Q5.1) Classify the following processes as spontaneous or not spontaneous and explain
your answer. a) The reversible isothermal expansion of an ideal gas. b) The vaporization of superheated water at 102C and 1 bar. c) The constant pre
Questions on Concepts Q4.1) Under what conditions are H and U for a reaction involving gases and/or
liquids or solids identical? H = U + (PV). H U for reactions involving only liquids or solids because, to a good approximation, the volume does not change
Chapter 18: Elementary Chemical Kinetics
Questions on Concepts Q18.1) Why is the stoichiometry of a reaction generally not sufficient to determine
reaction order? The order of a rate equation for a chemical reaction indicates the concentration dependence
Chapter 16: Kinetic Theory of Gases
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q16.1) Why is probability used to describe the velocity and speed of gas molecules?
Velocity is a
Chapter 17: Transport Phenomena
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q17.1) What is the general relationship between the spatial gradient in a system
property and the flu
Thermo Chapter 7 Questions on Concepts Q7.1) Explain why the oscillations in the two-phase coexistence region using the
Redlich-Kwong and van der Waals equations of state (see Figure 7.4) do not correspond to reality. The oscillations predict that as V in
Chapter 3: The Importance of State Functions: Internal Energy and Enthalpy
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q3.1) Why is CP,m a function of temperature for ethane, bu
Thermo Chapter 8 Questions on Concepts Q8.1) At a given temperature, a liquid can coexist with its gas at a single value of the
pressure. However, you can sense the presence of H2O(g) above the surface of a lake by the humidity, and it is still there if t
Chapter 1: Fundamental Concepts of Thermodynamics
Problem numbers in italics indicate that the solution is included in the Students Solutions Manual. Questions on Concepts Q1.1) The location of the boundary between the system and the surroundings is a cho
Problem Set 2
Solutions
Due 9-11-15
12 pts.
CHEM 3321
Problem Set 2: 10 pts
Due: 9-11-15
1. Ideal vs. vdW gas (4 pts)
Calculate the pressure exerted by 1.0 mol C2 H6 behaving as (a) a ideal gas and (b) a van der
Waals gas when it is confined under the fol
Problem Set 11
Solutions
Not Due
0 pts.
CHEM 3321
Problem Set 11
Due: never
1. Chain Reactions
Identify any initiation, propagation, retardation, inhibition, and termination steps in the
following chain mechanisms:
i) AH A + H
initiation because radicals
Chem 3321 Fall, 2009 Hmwk Chapt 5 Numbers in parenthesis refer to problems in the first edition for which solutions have been posted. Problems Chapt 5 1, 5 (5.20), 6, 8 10, 13, 15 20(5.14), 22, 27, 32 (5.7), 34(5.2), 39(5.14), 41
Problem Set 1
Solutions
Due 9-4-15
13 pts.
CHEM 3321
Problem Set 1: 13 pts
Due: 9-4-15
1. Coffee House Equation of State (4 pts)
A coffee house spends a total of $100 per month to purchase three different kinds of coffee,
A, B, and C, which cost $5, $10,
Problem Set #7 Problems for Grading
1.
Using the Debeye-Huckel limiting law to estimate the mean ionic activity
coefficient, estimate the solubility of BaF2(s) in (a) water and (b) 0.2 M NaF (Ksp
= 1.7 x 10-6; use iteration to self-consistency in each cas
CHEM 3321
Homework for Grading
Ch 16
(show all work for full credit)
1.
Using the van der Waals equation of state, calculate the pressure exerted by 1 mole of carbon
dioxide at 0oC in a volume of (a) 1.00 liter, (b) 0.05 liter. (c) Repeat the calculation
GRADED HMWK CHAPT 19
1. A 0.400 mol sample of an ideal gas expands isothermally from T = 300 K and V = 1.00 L to V =
3.00 L.
a. How much work does the gas do if the expansion is into an evacuated space
(vacuum)?
b. How much work does the gas do if th
Chem 3321
Fall, 2016
Problem Set 3
1. An ideal gas ( C v 25 J/mol-K) at 298 K and 1 atm undergoes
a. An irreversible adiabatic compression against a constant external pressure of 10
atm
b. A reversible adiabatic compression to a final pressure of 10 atm
C
Chem 3321 Problem Set #6
1. Using Table 26.1 find Kp for the following reaction at 298K and 1 bar
N2O4(g) 2NO2(g)
(b) Solve for , the extent of reaction assuming one mole of reactant and no product is
initially present. (c) Repeat the calculation of at a
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Graded Hmwk Set 4
Chem 3321
Fall, 2016
1. Calculate the change in the entropy of the system and surroundings when one
mole of an ideal monatomic gas doubles its volume in (a) an isothermal reversible
expansion (b) an isothermal irreversible expansion into
Problem Set #5
Homework Problems for Grading (Ch 21 & 22)
Chem 3321
Fall, 2016
Find U, H, S, A and G in expanding one liter of an ideal gas at 1 atm and
25 C to 100 liters at the same temperature.
2. In the transition
CaCO3(aragonite)CaCO3(calcite)
o
G298
Problem Set #8
Chem 3321
Fall, 2016
1. What proportions of ethanol and water should be mixed in order to produce 100
cm3 of a mixture containing 50 percent by mass of ethanol? (b) What change in
volume is brought about by adding 1.00 cm3 of ethanol to the
CHEM 3321
PHYSICAL CHEMISTRY I
Fall 2015
Exam 2 Study Guide
Exam 2 details
50 minutes
100 points
MEMORY cleared calculator
you will have access to any non-SI unit conversions that you might need
SHOW ALL WORK!
Coverage:
Chapters 20 22 of McQ, but there ar
(II) (100%)
2008/12/12
Key
R=8.3145J/Kmol;Cv(idealgas)=3R/2;Cp(idealgas)=5R/2;1atm=1.01325bar
:
15%
1.
Internal pressure, T
a) Tc/(ThTc)
2.
Kirchhoffs law
b) 1 dV
3.
4.
Joule-Thomson coefficient,
Expansion coefficient,
c) |w|/qh
d) (dT/dP)H
5.
Isothe
'I. At 500C and 93.2 kPa, the mass density of sulfur vapour Is 3.710 kg m4.
What Is the molecular formula of suifur underthese conditions?
WW V: V?
PVW=RT
jagawr
Him
P
.35;
= arm :3; . 77%.; M 310g
M
561 ' 10% ft);
= 0.1% =. 156%
X:H 3%_g
W, 551mm, . Co
Problem Set 10
Solutions
Due 12-4-15
11 pts.
CHEM 3321
Problem Set 10: 11 pts
Due: 12-4-15
1. Mean Free Path and Collisional Frequency (2 pts)
At an altitude of 15 km the temperature is 217 K and the pressure 12.1 kP a. What is the
mean free path and coll