CHM 341 Fall 2015
Homework 1
Chapter 0: Fundamentals
Problem 1: (a) 300 Torr corresponds to what pressure in kPa? (b) Convert 150 kg/m3 to grams per
dm3.
Problem 2: If a cylindrical pill with hemispherical caps, as described in
the figure at right, has di
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CHM 341 Fall 2015 - QUIZ 6
Q1 (3 pts): For a certain reaction taking place at 27 oC (300 K) the enthalpy change is -90 kJ/mol
while the entropy change is -100 J K-1mol-1. (a) Calculate the change
Homework 7
Chapter 4 & 5: Gibbs energy, material equilibrium
Problem 1: Calculate the maximum non-expansion work (per mole) that can be obtained from a fuel
cell in which the chemical reaction is the combustion of propane at 298K. To what height (in meter
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CHM 341 Fall 2015 - QUIZ 4
Q1 (2pts): Expansion of a gas at constant pressure produces a positive change in enthalpy. Does the
system lose or gain heat from the surroundings? Does the temperatu
CHM 341 Fall 2015
Homework 5
Chapter 3 & 4: Thermochemistry and 2nd Law
Problem 1: Classify the following as endothermic or exothermic: (a) combustion of iso-octane for which
! r H " = 5461 kJ/mol, (b) a dissolution process for which !H " =+10 kJ/mol, (c)
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CHM 341 Fall 2015 - QUIZ 1
Q1 (2 points): According to the equipartition theorem what is the ratio of the average molar kinetic
energy (translational and rotational) of a gas of
gulf"
I.
Sew“ It.
Review Of important concepts. . .
Average kinetic energy of one mole of gas particles
2RT
2
pV=nRT=3nEKm
3
2
2
Average kinetic energy of a perfect gas depends only
on temperature: "“—'
EK(T1) = T1
EK (T2) T2
Average molecular speeds
ﬂag 9’7
Chapter 1: Properties of gases.
Equations of State
Equation of state: provides a relation between p, V, n, T
Examples: P = EN ’7, T) Experimentally we
V = f2“), n, T) observe that
ID, V, n, T
T = fslprVr ") are not independent
etc of one another
E
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!
Constants:
R = 8.3144 J K-1 mol-1
1 Pa = 1 kg m-1 s-2 = N/m2
1 N = 1 kg m /s2
NA = 6.022 x 1023 mol-1
R = 1.9872 cal K-1 mol-1
1 bar = 105 Pa
1 J = 1 N m = 1 kg m2 s-2
kB = 1.3807 x 10-23 J/K
R = 0.082058 L atm K-1 mol-1
1 atm = 1.01325 bar
1 Wa
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CHM 341 Fall 2015 - QUIZ 5
Q1 (3pts): Classify the following processes as endothermic or exothermic: (a) freezing, (b) combustion
reaction (c) ionization of a neutral atom or molecule. You must explain
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CHM 341 Fall 2015 - QUIZ 3
Q1 (2pts): Compare the work done in the two chemical reactions shown below (assume that all
gases behave as a perfect gas). What is the ratio |wB|/|wA| of the magnitude
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CHM 341 Fall 2015 - QUIZ 2
Q1 (2 points): The Maxwell speed distribution of gaseous He (M=4 g/mol)
at 400K is shown as the bold line in the plot. Which distribution function,
Homework 8
Chapter 5 & 6: Material equilibrium & mixtures
Problem 1: Calculate the boiling point of water at the top of San Francisco Peak (elevation 3851
m), where the barometric pressure is 65 kPa [vapH = 40.7 kJ/mol at the normal boiling point].
Proble
Homework 6
Chapter 4: The Second Law of Thermodynamics
Problem 1: Suppose that when you exercise, you metabolize 100 g of glucose and that all the energy released as
heat remains in your body at 37 oC (body temperature). What is the entropy change of your
CHM 341 Fall 2015
Homework 4
Chapter 2 & 3: First law and applications
Problem 1: Suppose that the expansion of a perfect gas takes place reversibly, but not
isothermally. Instead the gas cools as it expands according to T = Ti c (V-Vi) where Ti and Vi ar