Chemistry Topic 5 Equilibrium

What is an irreversible reaction?

It is a reaction in which reactants are converted to products but the products can’t be changed back

e.g 2Mg + O2 → 2MgO

What is a reversible reaction?

It is a reaction in which the products can be changed back to reactants

e.g CuSO4 + 5H20 ⇌ CuSO4.5H2O

If a reversible reaction is exothermic in one direction what will it be in the other direction?

Endothermic

What is the criteria for a dynamic equilibrium?

-Occurs in a closed system

-Occurs when the rates of forward and reverse reactions are equal

-occurs when the amount of reactants and products remain constant

What is a closed system?

A system in which no substances can get in or out whereas an open system allows entry and exit of substances

What three species will be present in a closed system?

-The rate of forward reaction equals the rate of reverse reaction

-The amount of hydrogen and iodine remains constant

-The amount of hydrogen iodide remains constant