Maxwell-Boltzmann Kinetics

The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain temperature.

• The maximum is higher and to the left of A.

• The maximum is higher and to the right of A.

• The maximum is lower and to the right of A.

• The maximum is lower and to the left of A.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

• X has the higher molar mass.

• Y has the higher molar mass.

• X has the higher average kinetic energy.

• Y has the higher average kinetic energy.

The diagram shows the energy profile for a catalysed and uncatalysed reaction. Which represents the enthalpy change, ΔH, and the activation energy, Ea, for the catalysed reaction?

• ΔH = z. ; E

  _a = x + z

• ΔH = z ; E

  _a = z + y

• ΔH = -z ; E

  _a = x

• ΔH = z + x ; E

  _a = x

Tags

NGSS.HS-PS1-4

Why does the rate of a reaction increase when the temperature is increased?

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-5

Which of the following is NOT a part of the Kinetic Theory of Matter?

• All matter is made up of tiny particles.

• Occasionally, particles stop moving.

• Particles are always moving in random paths.

• The type of movement of particles depends on the amount of energy.

Tags

NGSS.HS-PS3-4

Gas particles are in constant, rapid, straight-line ​ (a)   . The temperature is directly proportional to the average ​ (b)   . The hotter the temperature, the ​ (c)   the particles move.

• motion

• kinetic energy

• faster

Tags

NGSS.MS-PS1-4

The diagram represents the Maxwell‒Boltzmann energy distribution curve of the reactants for a chemical reaction with different activation energies, and . What is the reason why the rate of the reaction with activation energy energy E_a2 is greater?

• More frequent collisions between the particles occur.

• More energetic collisions between the particles occur.

• A catalyst has been added.

• The temperature is higher.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

Which statement best describes and explains the effect of a catalyst on the rate of a chemical reaction?

• The rate increases because the frequency of collisions between particles increases.

• The rate increases because more colliding particles have the energy needed to react.

• The rate increases because the activation energy increases.

• The rate increases because more molecules are present.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

Which statements explain the increase in the rate of a reaction when the temperature is increased?

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-5

Which is the activation energy of the forward reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4