AP CHEM Unit 6 In Class Review

Front

What is the balanced equation for the decomposition of N2O5?

Back

2N2O5(g) ⇌ 4NO2(g) + O2(g)

Front

Define the term '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 concentration of reactants in the rate law.

Front

What are the units of the rate constant (k) for a zero-order reaction with respect to time measured in minutes?

Back

min⁻¹

Front

Explain what a zero-order reaction means.

Back

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

Front

What is the significance of a catalyst in a chemical reaction?

Back

A catalyst increases the rate of a reaction by lowering the activation energy without being consumed in the process.

Front

How does temperature affect the rate of a chemical reaction?

Back

Generally, an increase in temperature increases the rate of a reaction due to higher kinetic energy of the molecules.

Front

What is the relationship between concentration and reaction rate in a first-order reaction?

Back

In a first-order reaction, the rate is directly proportional to the concentration of one reactant.

Front

What is the formula for calculating the rate of a reaction?

Back

Rate = k[A]^m[B]^n, where [A] and [B] are the concentrations of reactants and m and n are their respective orders.

Front

Define 'activation energy' in the context of chemical reactions.

Back

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

Front

What does the term 'equilibrium' mean in a chemical reaction?

Back

Equilibrium is the state in which the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.