Gases and Their Properties
WORKSHEET

(Do all work on separate paper!)

1. Which is NOT true of gas particles?
a) They are further apart than in a liquid.
b) They move more rapidly than in a liquid.
c) They are larger than particles in a liquid.
d) They move in random fashion.

2. As the temperature increases, the rate of motion of gas molecules ___
a) increases c) remains the same
b) decreases d) varies depending on the pressure

3. Which of the following is the best definition of pressure?
a) force per unit area
b) mass per unit area
c) number of collisions per unit time
d) number of particles per unit volume

4. Which law describes the relationship between the volume and temperature of a gas?
a) Avogadro's principle b) Boyle's law
c) Charles' law d) Dalton's law

5. If the pressure and number of moles of a gas remain constant, the relationship between the volume andtemperature, in kelvin, of the gas is a(n) __ proportion.
a) direct b) inverse c) designated d) reactive

6. If the pressure and number of moles of a gas remain constant, decreasing the volume will cause the temperature to ____.
a) increase b) decrease c) remain the same d) increase and then decrease

7. Which of graphs above shows the relationship between the volume and temperature for a gas if the number of moles and the pressure remain constant?
a) A b) B c) C d) D

8. Which law describes the relationship between the volume and pressure of a gas?
a) Avogadro's principle b) Boyle's law c) Charles' Law d) Dalton's law

9. If the temperature and number of moles of a gas remain constant, the relationship between the volume and pressure of a gas is a(n)___ proportion.
a) direct b) inverse c) designated d) reactive

10. If the temperature and number of moles of a gas remain constant, decreasing the volume will cause the pressure to ____.
a) increase b) decrease c) remain the same d) increase and then decrease

11. The relationship between the volume of a gas and the number of moles present, at constant temperature and pressure, is a(n) ____ proportion.
a) direct b) inverse c) designated d) reactive

12. A container of carbon dioxide has a volume of 340.0 cm³ at a temperature of 22^oC. If the pressure remains constant, what is the volume at 44^oC?

13. Plants release oxygen gas during the process of photosynthesis. A bubble of oxygen with a volume of 1.0 cm³ is released at a depth where the pressure is 180.0 kPa. What is the volume of the bubble just below the surface of the water, where the pressure is 100.0 kPa?

14. A weather balloon containing 15.0 L of helium is released at sea level. Both atmospheric pressure and the pressure in the balloon are 101.0 kPa. The temperature of the gas is 22^oC. As the balloon rises, it is exposed to decreasing atmospheric pressure and decreasing temperature. Describe the effect that each of these changes would have on the volume of the balloon.

15. Using the description of the balloon in #14, calculate its volume when it reaches a point in the atmosphere where the temperature is -8 ^oC and the atmospheric pressure is 10.1 kPa.