3.2 Behavoir Of Gases

Question 1

Temperature

Answer 1

Temperature is a measure of how fast the particles in an object are moving. The higher the temperature, the faster the particles are moving, also the higher the energy of the particles.

Question 2

Volume

Answer 2

Volume is the amount of space an object takes up. The volume of gas depends on the volume of its container.

Question 3

Describing Gas Behaviour

Answer 3

Gases behave differently than solids or liquids because of the space that exists between the particles. Gas behaviour depends on three factors: temperature, volume, and pressure

Question 4

Pressure

Answer 4

Pressure is the amount of force exerted on a certain area of surface. (The number of times the particles in a gas hit the inside of their container)

Question 5

Pressure’s relationship with force and area

Answer 5

Force
Pressure = ——-
Area
Force is a push or pull exerted on an object. Force is measured in newtons.
Units - pascals (Pa) or kilopascals (kPa)

Question 6

Gas behaviour laws

Answer 6

Shows the relationship between temperature, pressure, and volume.

Question 7

Boyle’s Law

Answer 7

PVB-pressure, volume, boyle’s
The law: at constant temperature, increasing the pressure of a gas will decrease the volume of the gas. When the pressure decreases the volume will increase.
“The volume of a gas is inversely proportional to the pressure of a gas (when temperature is constant).“

Question 8

Boyle’s Law in action

Answer 8

A. High altitude balloons can be filled with small volumes of Helium (He). As the ballon rises in the atmosphere,the air pressure around it decreases, allowing the helium gas to expand. This way the ballon reaches heights before popping!
B. As one pushes the plunger of a bicycle pump, the volume, the volume inside the pump cylinder gets smaller, increasing the pressure which forces air into the tire.
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Question 9

Charles Law

Answer 9

The law: at a constant pressure, an increase in temperature of a gas will increase the volume of a gas (flexible container). “The volume of a gas is directly proportional to the temperature of a gas (when pressure is constant).”

Question 10

Charles Law in action

Answer 10

Increase the temperature of gas in a balloon and the balloon gets bigger. 
Or
Heat a tire and it will expand.
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