6.1 Kinetic theory

The following statements are true for a reaction to happen EXCEPT

• Molecule must collide in correct orientation
• Molecule must collide with energy greater than E_a
• Effective collision will lead to a product formation
• Frequency of collision will lead to product formation

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

At higher temperature, 2000K, the curve is shifted to the right. Which of the following is true?

• fraction of molecules with energy > E_a increases
• fraction of molecules with energy > E_a decreases
• more particles under the curve
• less particles under the curve

Tags

NGSS.HS-PS1-5

State the equation shown in diagram below

• Activation energy
• Arrhenius equation
• Rate equation
• Rate constant

Name the shaded portion shown in the diagram below

• Fraction of molecules with energy > E_a
• Number of molecules with energy > E_a
• Molecules with energy > E_a
• Molecules with energy = E_a

The following statements are true EXCEPT

• k is rate constant
• It is Maxwell Boltzmann equation
• shaded portion is fraction molecules with energy > E_a
• A is orientation factor and collision frequency

When temperature increased by 10C, the rate double. Why?

• Collision becomes more frequent
• more successful collision happens at high temperature
• Rate of collision increases, as molecules move faster
• Collision becomes more energetic

Tags

NGSS.HS-PS1-5

Plot below is used to calculate activation energy. What is x and y axis?

• x = T, y = ln k
• x = ln k, y = 1/T
• x = 1/T, y = ln k
• x = T, y = k

Plot below is used to calculate activation energy. How E_a can be calculated?

• From the gradient. Gradient = - R/E_a
• From the gradient. Gradient = - E_a/R
• From the gradient. Gradient = E_a
• None of the above