Reversible reactions

What is a reversible reaction?

A reaction in which the products can react to reform the original reactants.

Give an example of a reversible reaction.

The thermal decomposition of ammonium chloride.

What does the symbol ⇌ represent?

A reversible reaction.

How is equilibrium defined?

When the forward and reverse reactions occur at the same rate in a closed system.

What is meant by a closed system in chemistry?

A system where no substances can enter or leave.

How does temperature affect a reversible reaction?

Increasing temperature favors the endothermic direction.

How does pressure affect a reversible reaction involving gases?

Higher pressure favors the side with fewer gas molecules.

What is dynamic equilibrium?

When the concentrations of reactants and products remain constant but the reactions continue.

Why can a reversible reaction not go to completion?

Because the products continually react to reform the reactants.

What is an example of an industrial reversible reaction?

The Haber process.

How does a catalyst affect a reversible reaction?

It speeds up both the forward and reverse reactions equally.

What happens to the position of equilibrium if the concentration of reactants increases?

It shifts to the right to produce more products.

What is the effect of removing a product from a reversible reaction?

The equilibrium shifts to produce more product.

What does it mean if a reaction is exothermic in one direction?

It is endothermic in the reverse direction.

What type of reaction occurs during the condensation of steam?

A reversible reaction between steam and liquid water.