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Kinetic Molecular Theory (Grades 11-12)

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Kinetic Molecular Theory

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

The Kinetic Molecular Theory of gases describes a gas as a large number of small particles (atoms or molecules), all of which are
  1. at rest.
  2. in constant random motion.
  3. in thermodynamic equilibrium.
  4. in static equilibrium.
According to the Kinetic Molecular Theory of gases, collisions between molecules are perfectly                .
  1. regular
  2. linear
  3. plastic
  4. elastic
Which of these is an assumption of Kinetic Molecular Theory?
  1. There are constant forces of attraction between the molecules.
  2. There are constant forces of repulsion between the molecules.
  3. There are constant forces of attraction and repulsion between the molecules.
  4. There are no attractive or repulsive forces between the molecules.
In the equation for average kinetic energy, [math]KE_"avg"=3/2(kT)[/math], what does [math]k[/math] stand for?
  1. Ideal Gas constant
  2. Boltzmann constant
  3. Planck's constant
  4. Gay-Lussac constant
According to Kinetic Molecular Theory, gas pressure is due to
  1. the mass of particles.
  2. the collisions of particles on the walls of a container.
  3. the forces of repulsion between the particles.
  4. the energy loss experienced by each particle.
The Boltzmann constant is equivalent to the ratio of the gas constant, R, to the                 constant.
  1. Avogadro
  2. Poisson
  3. Boyle’s
  4. Charles law
According to Kinetic Molecular Theory, what is the average kinetic energy of a molecule? (Given: [math]T[/math] is absolute temperature, and [math]k[/math] is a constant.)
  1. [math]3/2(kT)[/math]
  2. [math]2/3(kT)[/math]
  3. [math]3kT[/math]
  4. [math](kT)/2[/math]
Considering kinetic theory, what is the average kinetic energy of a gas at [math]25degC[/math]? (Boltzmann constant is [math]1.381×10-23[/math].)

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