qtr week 2

1. QUARTER 4: WEEK 2
SCIENCE 10
Prepared by:
Aple M. Rigor
Teacher III

2. Prepare yourselves Dear Student

3. Bring out your Week 2
Module 1 in Science 10

4. Let’s do
some Recap

5. What AM I
?

6. VOLUME
I am one of the measurable
properties of gas. I am denoted
by the symbol V. I am the
amount of space occupied by a
gas sample. My SI unit is in
liters (L)
What Am I?

7. Pressure
I am the next important measurable
property of the gas, which is denoted
by the symbol P. I am described as
the force exerted by the gas per unit
area. My unit can be ATM, Torr, Psi,
Pa and mmHg
What am I?

8. Temperature
I am denoted by the letter T. My value
depends on kinetic energy of gas.
Gases expand when I increased.
I can be expressed in Fahrenheit (◦ F),
Centigrade or Celsius (◦C), and Kelvin (K).
What am I?

9. The amount of gas
I am another measurable property of
gas. I am related to the number of
moles of gas and is generally
expressed in kilogram (kg) or gram (g).
What am I?

10. MELC:
•Investigate the relationship between:
•1 volume and pressure at constant temperature of a gas
•2 volume and temperature at constant pressure of a gas
•3 explains these relationships using the kinetic
molecular theory

11. Lesson 2: Gas
Law

12. Whats In: Activity 6
Directions: Identify the given pictures below by
choosing the appropriate answers found inside the
word pool.

13. Activity 6: Match Me
Gas and
volume
Gas and
temperature
Gas and
Pressure

14. Activity 6: Match Me
Gas and
volume
Gas and
temperature
Gas and
Pressure

15. Activity 6: Match Me
Gas and
volume
Gas and
temperature
Gas and
Pressure

16. Activity 6: Match Me
Gas and
volume
Gas and
temperature
Gas and
Pressure

17. Gas Law

18. Boyle’s Law
• Robert Boyle, an English chemist was the first to investigate the
relationship between the pressure of a gas and its volume at a
constant temperature.
• Based on his experiment made wherein he trapped a fixed
amount of air in a J-tube and changed the pressure at a
constant temperature,
• He found out that as THE PRESSURE INCREASES, THE
VOLUME DECREASES.
• He then concluded that the volume occupied by the fixed
amount of gas is inversely proportional to its pressure at a
constant temperature

19. Formula in calculating the relationship
between pressure and volume
In Boyle’s law, the following formulas are to
be used when three variables are given, and
one is unknown:
• P1 = P2V2/V1
• P2 = P1V1/V2
• V1 = P2V2/P1
• V2 = P1V1/P2

20. A sample of nitrogen gas (N2) has a volume of
12.0 L and a pressure of 760.0 mm Hg. When
the gas is released, it gives 32.0 L of nitrogen.
If the temperature is the same, what is the
new pressure of nitrogen?
First step is to identify the variables
• V1
• V2
• P1
• P2

21. A sample of
nitrogen gas (N2)
has a volume of
12.0 L and a
pressure of 760.0
mm Hg. When the
gas is released, it
gives 32.0 L of
nitrogen. If the
temperature is the
same, what is the
new pressure of
nitrogen?
• V1= 12.0L
• P1= 760.0mmHg
• V2=32.0L
• P2=?
P1 = P2V2/V1
P2 = P1V1/V2
V1 = P2V2/P1
V2 = P1V1/P2

22. A sample of
nitrogen gas (N2)
has a volume of
12.0 L and a
pressure of 760.0
mm Hg. When the
gas is released, it
gives 32.0 L of
nitrogen. If the
temperature is the
same, what is the
new pressure of
nitrogen?
• V1= 12.0L
• P1= 760.0mmHg
• V2=32.0L
• P2=?
P2 = P1V1/V2

23. • V1= 12.0L
• P1= 760.0mmHg
• V2=32.0L
• P2=?
P2 = P1V1/V2
P2=760 mmHg(12 L)/32 L
P2= 9120 mmHg L/32L
P2= 285 mmHg

24. • V1= 12.0L
• P1= 760.0mmHg
• V2=32.0L
• P2= 285 mmHg
P2 = P1V1/V2
P2=760 mmHg(12 L)/32 L
P2= 9120 mmHg L/32L
P2= 285 mmHg
THE PRESSURE INCREASES, THE
VOLUME DECREASES vise versa

25. Charles Law
• French physicist Jacques Charles determined the
volume-temperature relationship in gases.
• From his experiment on balloons, Charles observed that,
at constant pressure, the volume of gas increases
with every increase in temperature. Also, volume
decreases as temperature decreases.
• Charles’ law states that the volume of a fixed amount of
gas maintained at constant pressure is directly
proportional to its absolute temperature

26. In Charles’ law, the following formulas
are to be used when three variables are
given, and one is unknown:
•V1 = V2T1/T2
•V2 = V1T2/T1
•T1 = V1T2/V2
•T2 = V2T1/V1

27. • A mountain climber inhales 484.0 mL of air at a
temperature of -10.0oC. What volume (in mL) will the air
occupy in the mountain climber’s lungs if his body
temperature is 37.0 C assuming that the pressure
remains the same?
• Given:
• V1 = 484.0 mL T1 = -10.0 C
• T2 = 37.0 C Find: V2

28. • A mountain climber inhales 484.0 mL of air at a
temperature of -10.0oC. What volume (in mL) will the air
occupy in the mountain climber’s lungs if his body
temperature is 37.0 C assuming that the pressure
remains the same?
• Solution: Change the temperature to Kelvin when
they are given in Celsius.
• T1 = -10.0 C + 273 = 263 K
• T2 = 37.0 C + 273 = 310 K

29. V1 = 484.0 mL T1 = -10.0 C (263k)
T2 = 37.0 C (310k) Find: V2

30. Summary
Boyle’s Law Charles Law
Proponent Robert Boyle Jacques Charles
Constant value Temperature and
amount of gas
Pressure and amount
of gas
Principle As the Pressure
increases the Volume
decreases vise versa
As the Temperature
Increases the Volume
also increases
Formula P1 = P2V2/V1
P2 = P1V1/V2
V1 = P2V2/P1
V2 = P1V1/P2
V1 = V2T1/T2
V2 = V1T2/T1
T1 = V1T2/V2
T2 = V2T1/V1

31. APPLICATION
•As an application, as you can see if
there is huge fire you will see that
as the temperature brought by the
fire increases the volume of smoke
also increases

32. DO YOU
UNDERSTAN
D OUR
LESSON?

33. ASSESSMENT
•Write/type Charles if the
statement is for Charles law and
Boyles if its for Boyles

34. Charles law
As the Volume of Gas increase
the temperature of Gas increases
vise versa

35. Boyle’s law
•The Law states that as the
Pressure increases the Volume
decreases vise versa

36. Boyle’s law
•Temperature and amount of gas
are constant

37. Charles law
•Pressure and amount of gas are
constant

38. How was your score?

39. For your other activities
Please read and analyze you lesson 2 modules and answer the ff.
Activity 8 Crossword puzzle
Activity 9 Problem solving (set a only)
What I have learned page 22-23

40. Thank you for listening
SCIENCE
4th Quarter:
Week 2