AP Chemistry Unit 5 Review

Front

What is the overall reaction for the following steps: Step 1: AB + C₂ → ABC + C (slow), Step 2: C + AB → ABC (fast)?

Back

2AB + C₂ → 2ABC

Front

If the reaction rate increases by a factor of 4 when the concentration of reactant A is increased by a factor of 2, what is the order of the reaction with respect to reactant A?

Back

Second order

Front

What is NOT a way to speed up a reaction?

Back

Decrease the pressure

Front

Which of the following is a first order overall reaction: k₁= 1.000 M s⁻¹, k₁= 5403.2 M½ s½, k₁= 1.23 x 10⁻⁶ M⁻¹ s⁻¹, k₁= 10.7 s⁻¹?

Back

k₁= 10.7 s⁻¹

Front

If a reaction is second order with respect to carbon monoxide and the concentration of carbon monoxide is doubled, how does the rate of reaction change?

Back

Increases by a factor of 4

Front

Define reaction rate.

Back

The change in concentration of a reactant or product per unit time.

Front

What is a catalyst and how does it affect a reaction?

Back

A catalyst is a substance that increases the rate of a reaction without being consumed; it lowers the activation energy.

Front

Explain the concept of activation energy.

Back

Activation energy is the minimum energy required for a reaction to occur.

Front

What is the difference between zero order and first order reactions?

Back

In zero order reactions, the rate is constant and independent of reactant concentration; in first order reactions, the rate is directly proportional to the concentration of one reactant.

Front

What does it mean for a reaction to be second order?

Back

The rate of the reaction is proportional to the square of the concentration of one reactant or the product of the concentrations of two reactants.