This lesson plan outlines a lesson on ideal gases and their properties. The lesson begins with a review of the zeroth law of thermodynamics and temperature measurement. Students then perform an experiment involving a balloon, coke, and mentos to observe gas expansion. They analyze what occurred in the experiment and relate it to properties of ideal gases. The key properties of ideal gases are then discussed: they consist of many identical molecules, the molecular volume is negligible, molecules obey Newton's laws of motion and move randomly, and collisions are elastic and instantaneous. Students apply this by diagramming a property and answering questions to review the material.

1. Republic of the Philippines
Department of Education
Region VIII-Eastern Visayas
Division of Biliran
NAVAL SCHOOL OOF FISHERIES
Caraycaray, Naval, Biliran
A Detailed Lesson Plan in
Ideal Gases and Laws of Thermodynamics
I. Content: Ideal Gases and Laws of Thermodynamics
Content Standards: Ideal Gases
Performance Standards: Solve multi-concept, rich context problems using concepts
from rotational motion, fluids, oscillations, gravity, and
thermodynamics
Learning Competency: Enumerate properties of an ideal gas
STEM – GPR12GLT – IIh – 58
II. Subject Matter
A. Topic: Ideal Gases and Laws of Thermodynamics
B. Sub-topic: Properties of an Ideal Gas
C. Materials: multimedia
coke
mentos
balloon
D. Reference:
(1) Knight, R. (2007). Physics for Scientists and Engineers: A Strategic
Approach with Modern Physics [and Mastering Physics TM].
Pearson
(2) Young, Hugh D., and Roger A. Freedman. University physics with
modern physics. Pearson Higher Ed. 2015.
E. Values Integration: cleanliness and cooperation
III. Procedure
Teacher’s Activity
A. Preliminary Activity
“Raymart kindly lead the prayer.”
“Good morning class!”
B. Review
“What was our lesson last meeting?”
Student’s Activity
“Let’s bow our heads and feel the
presence of the Lord… Amen.”
“Good morning Ma’am!”

2. “Who can explain the connection
between the Zeroth Law of
Thermodynamics, temperature, thermal
equilibrium, and temperature scales?”
“Very good! It is the zeroth law,
because it precedes the first and second
laws of thermodynamics and is also a
tacit assumption in both laws.
C. Motivation
“Before we go to our topic, I want you
to look at the screen. This is my facebook
timeline. You can tell that I have shared a
photo. Anyone from the class knew this
actor?”
“Yes it is Mikael Daez and he happened
to be my ideal guy. He perfectly portrays
an image of tall, dark and handsome in
which I am looking in a guy.”
“Gases may also be perfect. We call it
an ideal gas. Let’s have an experiment
first involving a balloon, coke and
mentos.”
D. Lesson Proper
A. Activity
“I need to two (2) volunteers for this
experiment.”
“Yes, Kyla and Jasmine.”
“The rest of you must observe on what
will happen as we go along the
experiment.”
“Prepare a bottle of coke, balloon and
two (2) mentos.”
“Put the mentos inside the balloon and
open a bottle of coke.”
“Zeroth law of thermodynamics and
temperature measurement ma’am.”
“The zeroth law is a consequence of
thermal equilibrium and allows us to
conclude that temperature is a well-
defined physical quantity. The zeroth
law of thermodynamics states: If a body
A and a body B are both in equilibrium
with each other; then a body C which is
in thermal equilibrium with body B will
also be in equilibrium with body A and
the temperature of body C is equal to the
temperature of body A.
“It’s Mikael Daez Ma’am.”
“Us Ma’am.”
(The student will execute.)

3. “Stretch the opening of the balloon and
carefully place it at the tip of the coke
making sure that the mentos does not
drop inside the bottle.”
“Hold the balloon to guide the mentos
for it to drop inside.”
“Observe what happens.”
B. Analysis
“What have you observe class?”
“Right! Why did the balloon expand?
Yes, Ricky.”
“Yes, very good!”
“The mole is represented by the
bubbles. Mole or Avogadro’s number is
very important in an ideal gas.”
“Before you learn to solve problems
involving ideal gases, let us first delve
into its properties.”
C. Abstraction
“Ideal gas is the combination of
Boyle’s Law, Charles’ Law and Gay-
Lussac’s Law.”
“An ideal gas has a number of
properties. What is the first property?
Yes, Arnold.”
“Very good Arnold. Most of the real
gases exhibit this. What would be the next
property? Okay, Becca.”
“Thank you Becca. Meaning, the
volume occupied by a molecule is so
small compared to the volume occupied
by the gas itself. What is thenext property
of an ideal gas?”
“We have observed that the balloon
expands.”
“The balloon expanded because there
is a chemical in the mentos that affects
the solubility of the carbonation in
Coca-Cola, causing the carbon dioxide
to bubble out which makesthe balloon to
expand.”
“An ideal gas consists of a large
number of identical molecules.”
“The volume occupied by the
molecules themselves is negligible
compared to the volume occupied by the
gas.

4. “Who among the class knows Newton’s
laws of motion? Yes, Jammie.”
“Okay very good Jammie! Is it clear
class?
“What is the last property, Daisy.”
“Very good! When molecules collide, it
takesonly a very short period of time. Did
you understand class?”
D. Application
“Okay get a ½ crosswise paper and
make a diagram that shows one of the
properties of an ideal gas.”
“Are you finished class?”
“I need volunteers to draw on the
board.”
“Are their drawing all correct class?”
E. Generalization
“Again what are the properties of an
ideal gas class?
“Yes, France.”
“The molecules obey Newton's laws of
motion, and they move in random
motion.
“Newton's first law states that every
object will remain at rest or in uniform
motion in a straight line unless
compelled to change its state by the
action of an external force.”
“The second law explains how the
velocity of an object changes when it is
subjected to an external force.”
“The third law states that for every
action (force) in nature there is an equal
and opposite reaction.”
“Yes Ma’am.”
“The molecules experience forces only
during collisions; any collisions are
completely elastic, and take a negligible
amount of time.”
“Yes Ma’am.”
(after 5 minutes)
“Yes Ma’am!”
(the 4 students draw on the board)
“Yes Ma’am.”
“(1) An ideal gas consists of a large
number of identical molecules. (2) The
volume occupied by the molecules
themselves is negligible compared to the
volume occupied by the gas. (3) The
molecules obey Newton's laws of motion,

5. “Very good France.”
“No questions class?”
“Okay. Get a ¼ sheet of paper and
answer this.”
and they move in random motion. (4)
The molecules experience forces only
during collisions; any collisions are
completely elastic, and take a negligible
amount of time.
“None Ma’am.”
IV. Evaluation
Direction: Enumerate the properties of an Ideal Gas.
Answer Key:
1. An ideal gas consists of a large number of identical molecules.
2. The volume occupied by the molecules themselves is negligible compared to the
volume occupied by the gas.
3. The molecules obey Newton's laws of motion, and they move in random motion.
4. The molecules experience forces only during collisions; any collisions are
completely elastic, and take a negligible amount of time.
V. Assignment
Direction: Read in advance the Ideal Gas Law.
Prepared by:
CASSIELYN C. BRECIO
Teacher II Applicant