States of Matter

According to the kinetic theory, collisions between molecules in a gas ____.

a. are perfectly elastic

b. are inelastic

c. never occur

d. cause a loss of total kinetic energy

• a

• b

• c

• d

Which of the following statements is part of the kinetic theory?

a. The particles of a gas move independently of each other. .

b. The particles in a gas move rapidly.

c. The particles in a gas are relatively far apart.

d. all of the above

• a

• b

• c

• d

Particles in a gas are best described as ____.

a. slow-moving, kinetic, hard spheres .

b. spheres that are in fixed positions when trapped in a container

c. small, hard spheres with insignificant volumes .

d. hard spheres influenced by repulsive forces from other spheres

• a

• b

• c

• d

What instrument is normally used to measure atmospheric pressure?

a. thermometer

b. barometer

c. vacuum

d. manometer

• a

• b

• c

• d

What is the SI unit of pressure?

a. candela

b. mole

c. pascal

d. newton

• a

• b

• c

• d

What is one standard atmosphere of pressure in kilopascals?

a. 0 kPa

b. 760 kPa

c. 101.3 kPa

d. 1 kPa

• a

• b

• c

• d

Standard conditions when working with gases are defined as ____.

a. 0 K and 101.3 kPa

b. 0 K and 1 kPa

c. 0C and 101.3 kPa

d. 0C and 1 kPa

• a

• b

• c

• d

The pressure of a gas in a container is 152 mm Hg. This is equivalent to ____.

a. 0.2 atm

b. 2 atm

c. 0.3 atm

d. 0.4 atm

• a

• b

• c

• d

What happens to the average kinetic energy of the particles in a sample of matter as the temperature of the sample is increased?

a. The average kinetic energy decreases.

b. The average kinetic energy increases.

c. The average kinetic energy does not change.

d. The change in average kinetic energy cannot be determined.

• a

• b

• c

• d

With which temperature scale is temperature directly proportional to average kinetic energy?

a. Celsius

b. Fahrenheit

c. Kelvin

d. centigrade

• a

• b

• c

• d