AP Chemistry Unit 5

Which of the following changes would cause a reaction to proceed slower? Choose two.

• Increase in temperature

• Decrease in temperature

• Increase in reactant concentration

• Decrease in reactant concentration

Tags

NGSS.HS-PS1-5

What is the rate law of the following reaction?

2A + B -> C + D

• Rate = k 2[A][B]

• Rate = k[C][D]

• Rate = k[A]²[B]

Tags

NGSS.HS-PS1-5

Given the information in the chart, what is the reaction order?

• Zero

• First

• Second

• Third

Tags

NGSS.HS-PS1-5

Given the rate law of Rate = [A]²[B], what would be the result if the concentrations of A and B were both doubled?

• The rate will double

• The rate will quadruple

• The rate will increase by a factor of 8

• The rate will remain the same.

Tags

NGSS.HS-PS1-5

[Requires Calculator] After 6 minutes, 92% of a substance remains. Knowing this is first-order, what is the half life of the substance (in minutes)?

• 38 minutes

• 48 minutes

• 54 minutes

• 50 minutes

What is the role of D in this reaction?

• Catalyst

• Intermediate

What effect does an increase in temperature have on the activation energy of a reaction?

• Lowers the activation energy

• Increases the activation energy

• Increasing the temperature has no effect on the activation energy

What is the rate law of this reaction?

• R = k[NO₂]²

• R = k[NO₂][CO]

• R = k[NO₃][CO]

Tags

NGSS.HS-PS1-5