ESG 302 Homework #6
Deadline: Apr 5th, 2015
1 (25 points) The change in the Gibbs energy of a certain constant-pressure process was found to fit the
expression
(J) = 146.75 47.4 (K). Calculate the value of S for the process.
Hint: ( ) = ; Express final an

ESG 302 Homework #1
Deadline: Feb 22nd, 2015
1.1 (20 points) An elevator with a mass of 3,000 kg rests at level 20 m above the base of an elevator
shaft. It is raised to 100 m above the base of the shaft, where the cable holding it breaks. The
elevator fa

Example 1: Could 131 g of xenon gas in a vessel of volume 1.0 dm3 exert a pressure
of 20 atm at 25C if it behaved as a perfect gas? If not, what pressure would it exert? (b)
What pressure would it exert if it behaved as a van der Waals gas?
Example 2: In

Ideal and Real Gases
Exercise
1.1(a) (a) Could 131 g of xenon gas in a vessel of volume 1.0 dm3 exert a pressure of 20 atm at
25C if it behaved as a perfect gas? If not, what pressure would it exert? (b) What pressure
would it exert if it behaved as a van

Thermodynamics
10-1
Single-Component Systems
Definitions:
Intensive properties: independent of system mass
Extensive properties: proportional to system mass
Specific properties: extensive properties divided by mass
Example (FEIM):
Which of the following i

Auxiliary functions
Introduction to the project
Project preview:
Problem:
The CP for many materials can be expressed by the polynomial:
CP = a +bT + c T-2
Write a C code to compute the thermodynamic functions enthalpy H
and entropy S, with an option for u

Second Law of Thermodynamics
Part IV
Question: how to determine the
entropy in Joules experiment?
Solution :*
* Note that E in this example is equivalent to U (internal energy) described in our notes
Gasoline engine
3
ignition
P
2
Patm
0
1
intake/exhaust

First Law of
Thermodynamics
Part II
Other formulations of the First Law
1.
Work needed to an
change adiabatic
system from one
specified state to
another is the same
however the work is
done.
2.
The total energy of the
universe is conserved.
Illustration o

Second Law of Thermodynamics
Part I
Word of caution: for non-cyclic processes, 100% of
heat can be transformed into work without violating the
Second Law. What is a good example?
Answer: an ideal gas expands isothermally being in thermal contact with a
ho

Real and Ideal Gases
Example 1
Solution
Building Ideal Thermometer
Composition of air
Example 2
Real gases
Real gases have very different behavior from
ideal gases, notably in cases of high pressure or
near the condensation point - a number of
additional

Second Law of Thermodynamics
Part V
Example of residual entropy
S k log D
S 0.21J / K
Calculate a residual entropy
For one 1 g of CO at T = 0 K.
Carbon monoxide has a
small dipole and it freezes with
some residual order. That is,
COCOCOCO with some
molecu

First Law of Thermodynamics
Part IV
* Example
* Example
Jouls experiment
Question:
what is the
value of
work in this
system?
Note: T is internal pressure
What about other substances?

First Law of
Thermodynamics
RECAP: FROM
BARRONS PE EXAM
The internal energy is
kinetic and potential
energy
of
the
molecules composing
the system.
However, from a point
of view of classical
thermodynamics no
definition of internal
energy!
Video
HEAT AND W

2/20/2013
First Law of Thermodynamics
Part III
* Example
* Example
* Example
1
2/20/2013
* Example
2
2/20/2013
* Example
* Example
3
2/20/2013
* Example
4

Review for the midterm exam
April 3, 2015
General topics on the exam
Ideal Gas Law
First and Second Laws of
Thermodynamics;
Carnot engine.
Definitions of Cv, Cp, H, S, U, w, etc.
What is not on the exam
What to remember
Problems from the previous exam

ESG 302 Thermodynamics of Materials (Required)
Course Catalog description:
The basic laws and concepts of thermodynamics are elucidated, and the important thermodynamic relationships are
systematically developed with several references to the behavior of

The Second Law of Thermodynamics and the Universe
According to the second law of thermodynamics, the level of disorder in the universe is
steadily increasing. Systems tend to move from ordered behavior to more random behavior
(Entropy, p.1). When our univ

EXAMPLE PROBLEMS
PROBLEM 1. A strip of magnesium of mass 15 g is dropped into a beaker of dilute
hydrochloric acid. Calculate the work done by the system as a result of the reaction.
The atmospheric pressure is 1.0 atm and the temperature 25C.
SOLUTION 1

Quiz #1
02/15/2016
1. Which of the following are extensive properties and Why?
(A) Temperature
(B) Weight
(C) Volume
(D) Composition
(E) Pressure
2. Convert the temperatures and the other units bellow to their base thermodynamic units:
(A) 50 oC =
(B) 120

HW#1 (deadline: Friday, March 4th, 2016)
Question #1 (10 percents)
Thermodynamics assumes that matter is in its equilibrium state in order to make its calculations. Please,
indicate whether or not the systems below may or may have not achieved an equilibr

HW#3 (deadline: Monday, April 25th, 2016)
Question #1 (10 percents)
Calculate the entropy change of 2 mol of perfect gas when expands by factor of 4, isothermally
from a volume Vi to a volume Vf (Vf = 4Vi).
Example 3.1 Calculating the entropy change for t

HW#2 (deadline: Monday, April 4th, 2016)
Question #1 (5 percents)
A chemical reaction takes place in a container of cross-sectional area 50.0 cm2. As a result of the
reaction, a piston is pushed out through 15 cm against an external pressure of 121 kPa. C

ESG 302 -HW#3
(deadline: Monday, April 25th, 2016)
Question #1 (10 percents)
Calculate the entropy change of 2 mol of perfect gas when expands by factor of 4, isothermally
from a volume Vi to a volume Vf (Vf = 4Vi).
Question #2 (20 percents)
Calculate the

HW#2 (deadline: Monday, April 4th, 2016)
Question #1 (5 percents)
A chemical reaction takes place in a container of cross-sectional area 50.0 cm2. As a result of the
reaction, a piston is pushed out through 15 cm against an external pressure of 121 kPa. C

ESG 302 -HW#4 - Solutions
(Deadline: Friday, May 6th, 2016)
1. (20 percents) Calculate the change in the entropies of the system and the surroundings, and
the total change in entropy, when the volume of a sample of argon gas of mass 21 g at 298 K and
1.50

ESG 302 -HW#4
(Deadline: Friday, May 6th, 2016)
1. (20 percents) Calculate the change in the entropies of the system and the surroundings, and
the total change in entropy, when the volume of a sample of argon gas of mass 21 g at 298 K and
1.50 bar increas