The Nature of Gases

Pressure is a direct result of collisions between gas particles and the walls of their container.

• True

• False

According to Boyle's law, the volume of a gas is inversely proportional to its pressure at constant temperature.

• True

• False

When using Charles's law, temperature must be expressed in degrees Kelvin

• True

• False

A mole is the unit used to measure the amount of a given substance.

• True

• False

For a fixed amount of gas, a change in one variable (pressure, temperature or volume) affects the other two.

• True

• False

A milkshake is sipped through a straw at 0.071atm. The straw contains 5.0mL of liquid. How much liquid is consumed at 0.092atm?

• 0.10mL

• 3.9mL

• 6.3mL

• 7.8mL

The volume of a sample of helium is 4.5mL at 20C and 203.0kPa. After using the helium to inflate the balloon, the temperature changed to 10.0C. Pressure does not change. What will the volume be of the balloon?

• 2.25mL

• 3.78mL

• 4.34mL

• 6.85mL

A helium-filled balloon has a volume of 50.0L at 25C and 1.08atm. What volume will it have at .855atm and 10.0C?

• 15.0L

• 30.0L

• 60.0L

• 120.0L

What is the formula for Boyle's Law?

• P₁V₁=P₂V₂
• P₁V₁/P₂V₂
• P₁V₂=P₂V₁
• P₁/V₁=P₂/V₂

When Pressure increases then the Volume must...

• Increase
• decrease