AP Chem Thou Shall Not Forget

The particles under the purple curve (middle) have an average Kinetic Energy that is proportional to of 500K

• True

• False

Tags

NGSS.HS-PS1-5

Which step of a reaction mechanism determines the rate?

• the slow step

• the fast step

• the first step

• the second step

Tags

NGSS.HS-PS1-5

What order is the half life of Carbon¹⁴?

• Zero

• First

• Second

Tags

NGSS.HS-PS1-8

What is the unit for the rate constant (k) for 2^nd order reactions?

• s^-1

• M/s

• M^-1s^-1

Tags

NGSS.HS-PS1-5

How does a catalyst speed up a reaction?

• Adding more reactant

• Providing a pathway that has a lower activation energy

• Increasing the activation energy

• Increasing binding energy

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

What are the 2 characteristics that an effective collision must have? SELECT TWO

• Enough energy to overcome E_a

• Molecules in the correct orientations

• High enough temperature

• Apporpriate intermediates present

What is the rate law for the reaction with this slow elementary step? A --> B + C

• rate = k[A]²

• rate = k[B]²

• rate = k[A][B]

• rate = k[A]

Tags

NGSS.HS-PS1-5

What is NOT a way to speed up a reaction

• Add a catalyst

• Decrease the volume

• Increase the concentration of reactants

• Increase surface area of the solid

• Decrease the pressure

Tags

NGSS.HS-PS1-5

Which curve represents the most particles in this Maxwell-Boltzmann curve (# of particles vs. speed)?

• Black (peak on the left)

• Red (peak in the middle)

• Blue (peak on the right)

• They all have the same number of particles

Tags

NGSS.HS-PS3-2

Which curve in this Maxwell-Boltzmann distribution represents the highest proportion of particles moving the fastest (# of particles vs. speed)?

• Black (peak on the left)

• Red (peak in the middle)

• Blue (peak on the right)

• All particles are moving at the same speed

Tags

NGSS.HS-PS3-4