1. The document describes various gases and their properties including pressure, volume, temperature, and mass. It provides definitions and conversion formulas for units of pressure, volume, and temperature. 2. Boyle's law is introduced, which states that the pressure and volume of a gas are inversely proportional at constant temperature. An example problem demonstrates how to use the Boyle's law equation to relate initial and final pressure and volume. 3. The relationship between pressure and volume of a gas is investigated through example problems applying Boyle's law, such as calculating new volume given a change in pressure.

3. cup shirt book eraser

4. maple syrup shampoo orange juice
olive oil

5. helium in a
balloon
steam from
a kettle
nitrogen in a
tank
argon in a
tank

6. Gases are described in
terms of:
 Pressure (P)
 Volume (V)
 Temperature (T)
 Mass (N)

7. - described as a force acting on a specific
area.
Pressure (P)
=
Force
(F)
Area (A)
- has unit of Pa (standard unit of pressure)
atm, torr, psi, mm Hg, kPa and cm Hg

8. Pressure units and their equivalents:
• 1 atm = 760
torr
• 1 atm = 76 cm
Hg
• 1 atm = 101, 325
Pa
• 1 atm = 760 mm
Hg
a. 1.10 atm = ______
torr
b. 675 mm Hg = ______ torr
• 1 torr = 1 mm
Hg
c. 121 590 Pa= ______ atm
d. 1,140 torr = ______
atm
e. 2.5 atm = ______ cm
Hg
• 1 atm = 14.6956
psi
Sample Conversion : Conversion of Units
(Pressure)

9. 1. 95 cm Hg = ______ atm
Exercise # 1: Conversion of Units
(Pressure)
2. 18 torr = ______ mm Hg
3. 350 atm = ______ cm Hg
4. 9.5 atm = ______ torr
5. 121 752 Pa = ______ atm

10. - the amount of space occupied by the gas

11. - Common Units of Volume: cubic meter (m³),
cubic centimeter (cm³), liter (L) milliliter (mL)
Volume units and their
equivalents:
• 1 mL = 1 cm³
• 1 L = 1 dm³
• 1 m³ = 1000 L

12. - the measure of the hotness
or coldness of an object. It is
proportional to the average
kinetic energy of its molecule.

13. - units include Fahrenheit (°F), Celsius (°C),
and Kelvin (K),
Temperature units and their
equivalents:
• 0°C = 273.15 K • 0°C = 32°F
Temperature
conversions:
• ⁹⁄₅ °C + 32 = °F
• ⁵⁄₉ (°F – 32) =
°C
• °C + 273.15 =
K

14. Sample Conversion: Conversion of Units
(Temperature)
b. 72°C = ______ K
a. 42°F = ______ °C c. 35°C = ______ °F
d. 340°F = ______ °C

15. Exercise # 2: Conversion of Units (Temperature)
1. 0°C = ______ K
2. 212°F = ______ °C
3. 101.5°C = ______ °F
5. 15°C = ______°F
4. 75.2°C = ______ K
6. 855 K= ______ °C

16. - the amount of a gas
or its mass could be
expressed in moles or
grams.
- 1 mole = 6.022 x
10²³ units of
substance

18. Investigate the relationship between volume and pressure at
constant temperature of a gas.
At the end of the lesson, you should be able to:
Solve problems involving changes in the condition of the
gas using the equation for Boyle’s Law; and
Give application of Boyle’s Law in real life
situations.

19. (1627 –
1691)
• Boyle’s Law
• Boyle ‘s law states that
pressure is inversely
proportional to the volume at
a constant temperature.

20. • When volume increases,
pressure decrease. When
volume decreases,
pressure increases.

21. applications

24. ₁ ₁ = ₂ ₂
WHERE:
P₁ - Initial Pressure
P₂ - Final Pressure
V₁ - Initial Volume
V₂ - Final Volume

25. A gas occupies 12.3 liters at a
pressure of 40.0 mm Hg. What is
the volume when the pressure is
increased to 120.0 mm Hg?

26. The inflated balloon that slipped from
the hand of Dee Jay has a volume of
335 L at sea level 3 atm and it reached a
height of approximately 600L. Assuming
that the temperature is constant,
compute for the final pressure of the
balloon.

27. 1. A sample of neon has a volume of 225 cm³ at
2 atm of pressure. What will be the pressure of
the gas to have a volume of 500 cm³?
2. A quantity of gas confined in a cylinder has a
volume of 40 m³ at 800 torr. If the pressure of
the gas is raised to 1100 torr, what will be the
new volume of the gas?

28. Assessment 1
¼ sheet of paper

29. 1. Who was the English scientist
who studied the relationship
between the volume of a gas and its
pressure?
a. Amedeo Avogadro
b. Jacques Charles
Combine
c. Gay-Lussac
d. Robert Boyle

30. 2. Which statement describes the
volume-pressure relationship in
gases at constant temperature?
a. As pressure decreases, volume increases.
b. As pressure increases, volume also
increases.
c. As pressure increases, volume remains
constant.
d. As pressure remains constant, volume

31. 3. Which graph correctly represents
Boyle’s Law?

32. 4. Which of the following quantities
are inversely proportional in Boyle’s
Law?
a. number of moles and volume
b. volume and pressure
c. pressure and temperature
d. volume and temperature

33. 5–10 Given the unit, identify the measurable
property. ( pressure, volume, or temperature)
5. kPa
6. Atmosphere
7. Kelvin
8. Liter
9. m³
10. Pascal