3.4 Behavior of Gases

3.4 Behavior of Gases

Open Ended

What are some examples of gases in the Earth's atmosphere?

Properties of Gases

• Gases expand to fill their containers.

• They spread out easily and mix with one another.

• They have low densities and are compressible.

• Gases are mostly empty space.

• Gases exert pressure on their containers.

Multiple Choice

Gases are compressible.

• True
• False

Multiple Choice

Gases do not expand.

• TRUE

• FALSE

Gas Laws

• Volume of a gas is the same as the volume of the gas's container. But you must consider other factors such as pressure.

• The Gas Laws describe how the behavior of gases is affected by pressure, volume, and temperature.

• Gas laws help you understand and predict the behavior of gases in specific situations.

Open Ended

Gas laws help to describe

Boyle's Law

• The relationship between the volume and pressure of a gas.

• States, "For a fixed amount of gas at a constant temperature, the volume of a gas increases as the gas's pressure decreases. Likewise, the volume of a gas decreases as the gas's pressure increases.

Multiple Choice

What happened to the pressure between the two steps?

• pressure increased
• pressure decreased
• pressure stayed the same

Multiple Choice

What happened to the volume between the two steps?

• volume increased
• volume decreased
• volume stayed the same

Multiple Choice

A flask contains 155 cm³ of hydrogen at a pressure of 22.5 kPa. Under what pressure would the gas have a volume of 90.0 cm³ at the same temperature?

• 38.8 kPa

• 43.9 kPa

Guy-Lussac's Law

• Relates gas pressure to temperature.

• States "The pressure of a gas increases as the temperature increases, if the volume of the gas does not change. The pressure decreases as the temperature decreases."

Charles's Law

• relates temperature to volume.

• States "For a fixed amount of gas at a constant pressure, the volume of the gas increases as the gas's temperature increases.

• Because of Charles's law, an inflated balloon will pop when it gets too hot.

Multiple Choice

When a basketball is left outside in the cold it goes flat because the volume of air inside the ball has been reduced. What  gas law does this represent?

• Boyle's Law
• Charles's Law

Multiple Choice

Which law?

• Boyle

• Charles

• Landis

• Boykin

Multiple Choice

Which law?

• Charles 
• Boyle
• Hooke
• Peter Pan 

Multiple Choice

Which law?

• Charles 
• Boyle
• Hunsecker
• Newton

Multiple Choice

Charles' Law States...

• As Pressure goes up volume goes down
• As Pressure goes up temperature goes up
• As Volume goes up temperature goes up 
• As Pressure goes down volume goes down