As Kinetics Maxwell Boltzmann

The Maxwell–Boltzmann distribution of molecular energies in a sample of gas at a fixed temperature is shown.

Which letter represents the mean energy of the molecules?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4

The diagram shows the Maxwell−Boltzmann distribution of molecular energies in a gas at two different temperatures.

Which letter represents the most probable energy of the molecules at the higher temperature?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4

The question below is about the Maxwell–Boltzmann distribution shown for a sample of a gas, X, at two different temperatures.

Which letter shows the mean energy of the molecules at the higher temperature?

• P

• Q

• R

• S

Tags

NGSS.HS-PS3-2

The question below is about the Maxwell–Boltzmann distribution shown for a sample of a gas, X, at two different temperatures.

Which statement is correct for the higher temperature?

• The area under the curve to the left of Ea decreases.

• The total area under the curve increases.

• The activation energy decreases.

• More molecules have the mean energy.

Tags

NGSS.HS-PS1-5

This question is about the Maxwell–Boltzmann distribution of molecular energies in a sample of a gas shown in the figure below.

Which letter best represents the mean energy of the molecules?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-2

This question is about the Maxwell–Boltzmann distribution of molecular energies in a sample of a gas shown in the figure below.

What does the area under the curve represent?

• The total energy of the particles.

• The total number of particles.

• The number of particles that can react with each other.

• The total number of particles that have activation energy.

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

A catalyst works by

• changing the order of the reaction
• increasing the temperature
• lowering the activation energy
• making the activated complex

The graph shows how the activity of an enzyme change at different temperatures. Which statement BEST describes what happens to the enzyme when the temperature of the reaction increases to 63 degrees?

• The enzyme is used up and the reaction stops.

• The enzyme begins to decrease the rate of the reaction.

• The enzyme continues to increase the rate of the reaction.

• The enzyme changes shape and can no longer speed up the reaction.

Based on the graph, what is the optimal temperature for this enzyme? 

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Which of the following is FALSE for Maxwell Boltzmann distribution curve?

• Area under curve represent number of particles
• Increase in temperature will shift the curve to right
• High temp, fraction of molecules with energy > E_a increases
• At higher temp, area under curve is greater than at low temp

Tags

NGSS.HS-PS1-5