Thou Shalt Not Forget 3

What is the minimum energy required for particles to collide in order for a reaction to occur?

• Activation energy

• Thermal energy

• Potential energy

• Kinetic energy

What is the rate law for the elementary step 2A + B → C + D?

• Rate = k[A]2[B]2

• Rate = k[A]2[B]1

• Rate = k[A]1[B]2

• Rate = k[A]1[B]1

Tags

NGSS.HS-PS1-5

What are the units for the rate constant (k) in a 1st order reaction?

• s-1

• M-1s-1

• mol/Ls-1

• L/mol/s

Tags

NGSS.HS-PS1-5

Which graph is linear for a 2nd order reaction?

• ln[A] vs time

• ln[A] vs 1/[time]

• 1/[A] vs ln(time)

• 1/[A] vs time

What is the effect of adding a catalyst to a reaction?

• Lowers the activation energy

• Increases the activation energy

• Decreases the reactant concentration

• Reduces the surface area

Tags

NGSS.HS-PS1-4

What is the half-life for a 1st order process?

• t1/2 = 2k

• t1/2 = k/0.693

• t1/2 = k/2

• t1/2 = 0.693/k

What dictates the speed of a reaction?

• The fast step

• The slow step (rate-determining step)

• The initial concentration

• The catalyst

Tags

NGSS.HS-PS1-5

What are produced in one step and used up in a later step in reaction mechanisms?

• Intermediates

• Catalysts

• Products

• Reactants

What are used up in one step and produced in a later step in reaction mechanisms?

• Intermediates

• Catalysts

• Reactants

• Products