Question 1

Which of the following correctly describes the relationship between pressure and volume according to Boyle's Law?

Accepted Answer

Pressure is inversely proportional to volume.

Question 2

A sample of gas has a volume of 400.0 mL at 1.20 atm and 320 K. If the volume decreases to 325 mL while the temperature increases to 770 K, what is the new pressure? Use the combined gas law: $$ \frac{P_1$ V_1$}{T_1$} = \frac{P_2$ V_2$}{T_2$} $$

Accepted Answer

2.80 atm

Question 3

Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?

Accepted Answer

Charles' Law

Question 4

A 5.01 g gas has a pressure of 1.7 atm when the temperature is 60.0°C. What will be the temperature of the gas mixture if the volume and pressure are decreased to 2.45 L and 0.810 atm respectively? Use the combined gas law.

Accepted Answer

$$181 	ext{ K}$$

Question 5

A sealed container with a movable piston contains a gas with a pressure of 1300 torr, a volume of 800 mL, and a temperature of 315°C. What would the volume be if the new pressure is 1100 torr, while the temperature decreased to 25°C? Use the combined gas law.

Accepted Answer

$$0.051 	ext{ L}$$

Question 6

Which of the following is NOT a variable in the combined gas law equation?

Accepted Answer

Moles

Question 7

If the temperature of a gas is doubled while the pressure remains constant, what happens to the volume according to Charles' Law?

Accepted Answer

The volume is doubled.

Question 8

A gas sample is compressed from 2.0 L to 1.0 L at constant temperature. If the initial pressure was 0.5 atm, what is the final pressure? Use Boyle's Law: $$P_1$$ $$V_1$$ = $$P_2$$ $$V_2$$

Accepted Answer

1.0 atm

Question 9

Which scenario best illustrates Gay-Lussac's Law?

Accepted Answer

A tire's pressure increases on a hot day.

Question 10

A gas at 300 K and 1.0 atm is heated to 600 K at constant volume. What is the new pressure? Use Gay-Lussac's Law: $$\frac{P_1$}{T_1$} = \frac{P_2$}{T_2$}$$

Accepted Answer

2.0 atm

Question 11

Which of the following is a correct application of the combined gas law?

Accepted Answer

Calculating the pressure of a gas when both volume and temperature change.

Question 12

A gas occupies 3.0 L at 2.0 atm and 300 K. What will its volume be at 1.0 atm and 600 K? Use the combined gas law.

Accepted Answer

12.0 L

Question 13

Which of the following changes will NOT affect the pressure of a gas in a sealed container?

Accepted Answer

Changing the color of the container

Question 14

A gas sample at 1.5 atm and 350 K is cooled to 175 K at constant volume. What is the final pressure? Use Gay-Lussac's Law.

Accepted Answer

0.75 atm

Question 15

Which of the following best explains why a hot air balloon rises?

Accepted Answer

Heating the air inside increases its volume, decreasing its density.

Combined Gas Law: Relationships Between Pressure, Volume, and Temperature

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