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A Detailed Lesson Plan

In Science 10

February,27,2019

I. LEARNING OBJECTIVES:
At the end of 45 minutes the students are expected to:
a. define Boyle’s Law;
b. define pressure and volume;
c. relate Boyle’s Law in a real life situation;
d. calculate some problems about the relationship between pressure and
volume; and
e. explain the relationship between volume and pressure of a gas in Boyle’s
law thru an activity.

II. LEARNING CONTENT

Unit : Unit IV Chemistry at Works
Topic : Boyle’s Law
Reference : Johny A. Ching et.al Grade 10, Connecting( A
progressive approach) pages 266-267
Materials: : Audio Visual Materials(PowerPoint
Presentation,Laptop,)Instructional Materials
(Syringe,Marshmallow,Manila Paper,Board
Marker )
Strategies: Collaborative Learning Critical Thinking,
Collaborative Skill, Inquiry-Based Approach.

III. LEARNING PROCEDURES:

Teacher’s Activities Student’s Activities
A. Preliminary Activity
a. Prayer
b. Customary Greetings
c. Classroom Management
d. Checking of Attendance

B. Motivation
Activity #1 “Let’s Breathe”
Mechanics:
1. All of the boys will stand.
2. They need to inhale and exhale
for five (5) repetitions.
3. All girls will observe the chest
part of the boys and will give their
observations later.
Activity #2 “Prepare To Blow” Mechanics:
1. All of the girls will stand.
2. They need to fill their mouth
with air.
3. The boys will observe the
cheeks of the girls and will give
their observations.

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 C. Presentation of the lesson:

Girls what did you observed? Sir as the boys inhaled, their chest risen
and as they exhale their chest return to
normal
Very good!

What is the reason why their chest Their lungs expand because of the air.
risen?

That’s right! When we inhale there is

increase of volume of air in our
lungs thus our lungs expand.

Boys what did you observed? Sir as the girls filled their mouth with air
their cheeks become bigger.
Very good!

Based on the activity what do you Sir I think its about volume of gas?
think is our topic for today?

Very good! Your close enough.

Any other idea? About gas law sir!

Very good! Our topic for today is

about gas law but we will focus with the
Boyle’s Law.

Let us now define our objectives At the end of 45 minutes the students are
for today’s discussion. expected to:

a. define Boyle’s Law;

b. define pressure and volume;
c. relate Boyle’s Law in a real life
situation;
d. calculate some problems about the
relationship between pressure and
volume; and
e. explain the relationship between
volume and pressure of a gas in Boyle’s
law thru an activity.

Are you ready to listen and learn Yes sir!

more about our lesson?

Now take a look at this image!

What can you say about the Sir, as pressure increases the volume
image? goes down and vice versa.

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 Very good!

That is what Boyle’s law all

about. The pressure and volume are
inversely proportional

D. Development of the lesson

a. Introduction
Now that you have already an
idea what Boyle’s Law is, let us Yes sir
discuss it further. Are you ready?

Who among you went to Baguio Sir

or passed by Sta. Fe?

Yes Liberty, can you please give These are high and mountainous places
us an idea about these places? sir.

Do you ever feel that your ears

pop while going up the Yes sir
mountains?

Thank you! Liberty

Who among you experienced to Sir

dive or swim deeply into the
water?

Yes Clarence, can you please

tell us how do you feel whenever I cannot stay too long deep in the water.
you are diving or swimming
deeply into the water?

Why do you say so? I am running out of air Sir.

Thank You! Clarence

These activities class are very

common or simple but we are not
aware that there is a certain law
behind it.

b. Deepening
Now that you already have an
idea about the topic for today’s
discussion, let us discuss more
about it.
First, let’s define what is Boyle’s Boyle’s Law
Law. - discovered by Sir Robert Boyle during
the 17th century.
- is a law about ideal gases.
- states that “there’s an inverse
relationship between the pressure
exerted on a quantity of gas and its
volume if the temperature is held
constant.
In other words, as the pressure
increases, the volume decreases and
vice versa.

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 For us to understand better the
succeeding topics, it is important for us
to define first what is pressure and
volume.

First, what is Pressure? Pressure

- is a force exerted by the substance per
unit area on another substance.

Next, what is a Volume? Volume

-is the amount of space occupied by a
substance.
- is the quantity of three-dimensional
space occupied by a liquid, solid, or gas.

Before we calculate, how do we

explain Boyle’s Law again?

Kindly read it for us Eugene! Yes sir

Pressure is inversely proportional to

the volume of the container, assuming
the temperature is constant. Volume
increases when the pressure goes down
and vice versa.

Thank you! Eugene

Let me show you some images

that could further explain the
relationship of the two.

Is there any question class before we None sir

continue the discussion?

Okay so let us proceed.

How do we calculate the

relationship between pressure and
volume?

Let us define first the formula on

how to calculate the relationship
between pressure and volume.

Whereas:
P1 – is the initial pressure
V1 – is the initial volume
P2 – is the final pressure
V2 – is the final volume

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 Here is an example:
I will do the first example and
show you how to solve the problem and
you will do it later. Example # 1
2,500ml of gas at standard
temperature is compressed to 473ml.
What is the new pressure of the gas if the
initial pressure is 2 atm?

Given:
P1 = 2 atm P2 = ?
V1 = 2,500ml V2 = 473ml

Solution:
P1V1 = P2V2
P2 = P1V1
V2
P2 = (2 atm)(2,500ml)
(473 ml)
P2 = 10.57 atm
Example # 2
A balloon has a volume of 550ml at sea
level (1.0 atm) and is allowed to rise to an
altitude of 6.5 km, where the pressure is
0.40 atm. Assume that the temperature
remains constant. What is the final
volume of the balloon?

Given:
P1 = 1.0 atm P2 = 0.40atm
V1 = 550 ml V2 = ?

Solution:
P1V1 = P2V2
V2 = P1V1
P2
V2 = (1.0 atm)(550 ml)
(0.40 atm)
V2 = 1,375 ml

Example # 3
A sample of gas occupies a volume of
155ml at 550atm and 39˚C. Calculate
the new pressure if its volume increases
to 270ml at constant temperature.

Given:
P1 = 550 atm P2 = ?
V1 = 155 ml V2 = 270 ml

Solution:
P1V1 = P2V2
P2 = P1V1
V2
P2 = (550atm)(155ml)
(270 ml)
P2 = 315.74atm

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Now that you already know how to
calculate Boyle’s law lets have an
activity to see how Boyle’s law works.

E. Application
This activity is called “Magic
Marshmallow”

- There will be 2 groups in this

activity, the students on my left
will be the group 1 and in my
right will be the group 2.

- I already provided your materials

on this activity and the
instructions are inside the
envelop. Choose your Leader,
Material grabber, Note taker,
Observer and Presentor
- This activity is good for 10
minutes and your presentor will
explain your activity infront

Group 1 Instructions

1. Put the marshmallow inside the

syringe and try to increase the volume of
gas in the syringe.
2. Observe what will happen to the
marshmallow and document it in the
paper provided.

Group 2 Instructions

1. Put the marshmallow inside the

syringe and try to decrease the volume of
gas in the syringe.
2. Observe what will happen to the
marshmallow and document it in the
paper provided.
Time starts now!

Times up!
Presentors from both groups kindly
go here in front and explain your work

RESULTS

Group 1

Before

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 After

Group 2

Before

After

Group 1 kindy explain what

happened?. As we increase the volume of gas, the
marshmallow becomes bigger. It
means that the pressure is decreased.

Very good!
Group 2 kindly explain your activity? As we decrease the volume of gas, the
marshmallow shrinks. It means that
the pressure is increased.

Very good!
The activity is simple representation
how Boyle’s law works

F. Generalization:
Do you still have questions
regarding Boyle’s law? None sir!

What is pressure? Force exerted by the substance per

unit area on another substance.

What is volume? is the amount of space occupied by a

substance

What does Boyle’s Law states? Pressure is inversely proportional to

the volume of the container, assuming
the temperature is constant.

G. Valuing
Now after knowing what are
Boyle’s Law and the relationship
between pressure and volume, what
have you realized?
Yes, Camille
That Boyle’s Law is not purely about
numbers or computations but it could
explain also some real life situations like
breathing, diving, the use of syringes,
popping of ears if go to high places.

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 Very good! Camille

We are surrounded with things

that involves pressure and volume. One
of the best example is breathing that we
do everyday. Once we go into vacation.
We can relate Boyle’s law.

B. Evaluation:
Bring out ¼ sheet of paper and
solve the following problem. in three
(3) minutes. Write the complete
solution.

At 1.70 atm, a sample gas takes

up 520ml. If the pressure on the gas P1= 1.70atm P2= 3.75atm
is increased to 3.75atm, what will be V1= 520ml V2= ?
the new volume?
P1V1=P2V2
V2= P1V1
P2
V2= (1.70atm)(520ml)
3.75atm
V2= 235.73ml

IV. Agreement
Search for other examples or real life applications of Boyle’s Law. You can
use all the resources that you have.

References:
Johny A. Ching et.al Grade 10, Connecting( A progressive approach) pages 266-267

Prepared by:

Jefferson P. Ballad
Student Teacher

Noted by: Recommending Approval: Approved by:

LIMER G. VIERNES BERNADITH CRISTOBAL DIONICIO D. VILORIA, EdD

CooperatingTeacher BEC-Coordinator BEC-Principal