Question 1

A sample of radon gas (Rn) occupies a volume at 75 $$^\circC $$and 0.85 atm. If you have 0.20 mol of Rn, what is the volume occupied by the gas? (Use $$R = 0.0821\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$})$$

Accepted Answer

1.4 L

Question 2

Which of the following correctly expresses the Ideal Gas Law?

Accepted Answer

$$P V = n R T$$

Question 3

A steel cylinder contains a gas at 5.50 atm and 25.0 $$^\circC. If $$the temperature is lowered to -45 $$^\circC$$, what will be the new pressure, assuming the volume is constant?

Accepted Answer

4.21 atm

Question 4

A balloon has a volume of 2.50 L at 25.0 $$^\circC. $$What will be its volume at -78 $$^\circC$$, assuming constant pressure?

Accepted Answer

1.64 L

Question 5

According to Boyle’s Law, what happens to the pressure of a gas if the volume is halved at constant temperature?

Accepted Answer

The pressure doubles

Question 6

A diver takes a balloon filled with 6 L of air from the surface (1 atm) to a depth of 20 m, where the pressure is 3 atm. What is the new volume of the balloon, assuming constant temperature?

Accepted Answer

2 L

Question 7

Which of the following statements best describes what happens inside your lungs when the diaphragm contracts?

Accepted Answer

Pressure decreases, and air flows in.

Question 8

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

Accepted Answer

Charles’s Law

Question 9

A 0.50 mol sample of $$\mathrm{O_2$} is at 1.0 $$atm and 273 K. What is its volume?

Accepted Answer

11.2 L

Question 10

Which of the following is a correct statement of Avogadro’s Law?

Accepted Answer

At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles.

Question 11

A gas sample at 2.0 atm and 300 K occupies 4.0 L. If the pressure is increased to 4.0 atm and the temperature is raised to 600 K, what is the new volume?

Accepted Answer

8.0 L

Question 12

Which of the following best explains why deep-sea divers must ascend slowly to the surface?

Accepted Answer

Rapid ascent causes dissolved gases in the blood to expand, potentially forming dangerous bubbles.

Question 13

Which of the following graphs best represents Boyle’s Law?

Accepted Answer

A plot of $$P vs$$ $$V is a $$hyperbola, and a plot of $$1/P vs$$ $$V is a $$straight line.

Question 14

A gas sample is compressed from 10.0 L to 2.0 L at constant temperature. If the initial pressure was 1.0 atm, what is the final pressure?

Accepted Answer

5.0 atm

Question 15

Which of the following is NOT an assumption of the ideal gas law?

Accepted Answer

Gas particles have significant volume.

Question 16

A 1.0 L container holds 0.040 mol of $$\mathrm{CO_2$} at 300 K. $$What is the pressure inside the container? ($$R = 0.0821\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$})$$

Accepted Answer

0.98 atm

Question 17

A gas occupies 3.0 L at 2.0 atm and 300 K. If the temperature is doubled and the pressure is halved, what is the new volume?

Accepted Answer

12.0 L

Question 18

Which of the following best describes Amontons’s Law?

Accepted Answer

At constant volume, the pressure of a gas is directly proportional to its temperature.

Question 19

A 5.0 L sample of gas at 1.0 atm and 300 K is transferred to a 10.0 L container and heated to 600 K. What is the final pressure?

Accepted Answer

1.0 atm

Gas Laws I: Fundamental Laws Governing Gases

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