Reversible Reactions and Dynamic Equilibrium

Flashcards covering concepts of reversible and irreversible reactions, dynamic equilibrium, and closed systems.

What type of reaction is the combustion of methane and oxygen to form carbon dioxide and water?

A one way or irreversible reaction.

Which example of a reversible reaction is used to make ammonia?

The Haber process.

In chemical equations, what does a double arrow specifically illustrate?

A reversible reaction that can reach equilibrium.

What is meant by a closed system in chemistry?

A system where no atoms can enter or leave.

At the start of a reaction with only reactants in a closed container, what is the initial rate of the reverse reaction?

It has a rate of zero.

As a forward reaction proceeds, why does its rate decrease?

Because the concentration of reactants decreases.

At what point do scientists say a reversible reaction has reached equilibrium?

When both the forward and reverse reactions are taking place at the same rate.

Why is equilibrium in a reversible reaction termed a dynamic equilibrium?

Because both the forward and reverse reactions are still taking place.

Does reaching chemical equilibrium mean that the concentration of reactants is equal to the concentration of products?

No, it means the concentrations remain constant, but they do not have to be equal.

What occurs if a reversible reaction is started with only products and no reactants, keeping all other conditions identical?

The reaction reaches the same equilibrium point with the reactants and products having the same relative concentrations.