IB Physics Topic B.3 Gas Laws Questionbank (SL/HL)

Question 1

SLPaper 2

The graph shows the variation of pressure $p$ with volume $V$ for a fixed amount of gas. Two curves are shown:

The dashed line represents gas behavior at temperature $T_{1}$ .
The solid line represents the same gas at a higher temperature $T_{2}$ .

1.

State the relationship between pressure and volume for a fixed mass of gas at constant temperature.

[1]

2.

Using the graph, outline how pressure changes with increasing volume for both curves.

[1]

3.

Explain how the graph indicates that the solid curve corresponds to a higher temperature.

[2]

4.

Determine the pressure when the volume is $4.0 \times 1 0^{- 3} m^{3}$ for both curves.

[2]

Question 2

SLPaper 2

A sealed container holds a fixed mass of gas at constant temperature. The volume of the gas is reduced from $4.0 m^{3}$ to $2.0 m^{3}$ .

1.

State the gas law that applies to this situation.

[1]

2.

If the initial pressure is $100 kPa$ , calculate the final pressure.

[2]

3.

Explain why the pressure increases as the volume decreases.

[1]

Question 3

SLPaper 1A

An ideal gas is confined in a container with a movable piston at a temperature of $27^{\circ} C$ . If the volume of the gas is doubled while the pressure remains constant, what will be the final temperature of the gas in degrees Celsius ( $^{\circ} C$ )?

Question 4

SLPaper 1A

If the number of molecules in a sealed container is doubled, what happens to the pressure (assuming constant volume and temperature)?

Question 5

SLPaper 1A

Two gases are sealed in two identical rigid containers. Gas $A$ has a mass of $m$ , pressure $P$ and absolute temperature $T$ . Gas $B$ has a mass of $\frac{m}{2}$ , pressure $2 P$ , and absolute temperature $2 T$ . What is $\frac{molar mass of A}{molar mass of B}$ ?

IB Physics B.3 Gas Laws Questionbank

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