Unit 7 Gasses

When Pressure increases then the Volume must...

• Increase
• decrease

When Volume increases then Pressure must...

• Increase
• Decrease

What is the formula for Boyle's Law?

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

What is the new volume of the gas if the pressure on 350 L of oxygen at 720 mm Hg is decreased to 600 mm Hg?

(Helpful hint: use one of these formulas to solve:

P₁V₁=P₂V₂

V₁/T₁=V₂/T₂

V₁/n₁=V₂/n₂)

• 420 L

• 29.16 L

• 4200.0 L

• 291.6 L

A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?

(Helpful hint: use one of these formulas to solve:

P₁V₁=P₂V₂

V₁/T₁=V₂/T₂

V₁/n₁=V₂/n₂)

• 12.9 L

• 0.72 L

• 7.2 L

• 3.44 L

A gas at a volume of 4 liters is at a pressure of 2 atm. The volume is changed to 16 Liters, what must the new pressure be?

(Helpful hint: use one of these formulas to solve:

P₁V₁=P₂V₂

V₁/T₁=V₂/T₂

V₁/n₁=V₂/n₂)

• 2 atm

• 12 atm

• 10 atm

• 0.5 atm

The pressure on a sample of gas is increased from 1.0 atm to 3.0 atm. If the new volume is 0.52 L, find the original volume.

(Helpful hint: use one of these formulas to solve:

P₁V₁=P₂V₂

V₁/T₁=V₂/T₂

V₁/n₁=V₂/n₂)

• 0.52 L

• 1.56 L

• 0.173 L

• 1.00 L

What type of relationship do pressure and volume have?

• direct

• inverse

• no relationship

• I don't know

The relationship of which two variables are compared in Boyle's Law?

• pressure & volume
• volume & temperature
• temperature & pressure
• volume & moles (amount of gas)

LeGarrette Blount decides to go scuba diving while on vacation in Mexico. As he swims deeper into the ocean, the pressure pushing on him increases. Based on the relationship in Boyle’s law, what would happen to the volume of a LeGarrette’s lungs with this increase in pressure?

• volume of the lungs would increase
• volume of the lungs would have no change
• volume of the lungs would double
• volume of the lungs would decrease