AP Chemistry Unit 5 Review

Front

What is the order of a reaction if the rate increases by a factor of 4 when the concentration of reactant A is increased by a factor of 2?

Back

The order of the reaction with respect to reactant A is second order.

Front

What is the rate constant (k) for a first order overall reaction?

Back

k = 10.7 s⁻¹.

Front

What effect does increasing the temperature have on a chemical reaction?

Back

Increasing temperature increases the number of collisions per second of chemical reactants, increases the speed of reaction, and can increase the pressure of reactants.

Front

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

Back

The overall reaction is 2AB + C₂ → 2ABC.

Front

What is the rate equation for the decomposition of nitrous oxide given the mechanism: N₂O(g) → N₂(g) + O(g) (slow), N₂O(g) + O(g) → N₂(g) + O₂(g) (fast)?

Back

The consistent rate equation is rate = k [N₂O].

Front

Define reaction order in the context of chemical kinetics.

Back

Reaction order is the power to which the concentration of a reactant is raised in the rate law, indicating how the rate of reaction depends on the concentration of that reactant.

Front

What is the rate law for a second order reaction with respect to reactant A?

Back

The rate law is rate = k [A]².

Front

How does a catalyst affect the rate of a chemical reaction?

Back

A catalyst increases the rate of a chemical reaction by lowering the activation energy.

Front

What is the significance of the rate constant (k) in a chemical reaction?

Back

The rate constant (k) is a proportionality factor that relates the rate of a reaction to the concentrations of the reactants.

Front

What is the effect of concentration on the rate of a zero order reaction?

Back

For a zero order reaction, the rate is constant and does not depend on the concentration of the reactants.