Kinetic Molecular Theory

Which of the following is a property of gases according to the kinetic molecular theory?

• Gases have a definite shape.

• Gas particles are in constant, random motion.

• Gas particles are tightly packed.

• Gases have a fixed volume.

What happens to the kinetic energy of gas particles as the temperature increases?

• It decreases.

• It remains constant.

• It increases.

• It becomes zero.

Which process describes the movement of gas particles from an area of high concentration to an area of low concentration?

• Effusion

• Diffusion

• Condensation

• Sublimation

What is the term for the change of state from a gas to a liquid?

• Sublimation

• Evaporation

• Condensation

• Freezing

Which of the following statements is true for ideal gases but not for real gases?

• Gas particles have no volume.

• Gas particles attract each other.

• Gas particles have mass.

• Gas particles are visible.

Explain why gases diffuse faster than liquids.

• Gases have higher density.

• Gas particles move more slowly.

• Gas particles have more space to move.

• Gas particles are heavier.

Compare the behavior of real gases to ideal gases at high pressures.

• Real gases behave more ideally.

• Real gases deviate more from ideal behavior.

• Real gases have no volume.

• Real gases have no mass.

Design an experiment to demonstrate the diffusion of gases using household materials.

• Use a balloon and a pin.

• Use a jar and a candle.

• Use a perfume bottle and a stopwatch.

• Use a thermometer and a beaker.

Analyze the effect of temperature on the phase change from liquid to gas.

• Higher temperature decreases the rate of phase change.

• Higher temperature increases the rate of phase change.

• Temperature has no effect on phase change.

• Lower temperature increases the rate of phase change.

Evaluate the statement: "All gases behave ideally under all conditions."

• True, because gas particles are always in motion.

• False, because real gases deviate under high pressure and low temperature.

• True, because gas particles have no volume.

• False, because gas particles are always attracted to each other.