Equilibrium

• Irreversible reactions are reaction where the reactants convert to products and the products cannot convert back to the reactants
• A reversible reaction is one in which the products, once made, can react to reform the reactants.
• The amount of energy transferred will be the same in each direction.
• A closed system is one where no substances can get in or out.
• An open system allows entry and exit of substances.
• In a reversible reaction, equilibrium is reached when the rate of the forward reaction is equal to the rate of the reverse reaction.
• In equilibrium, the concentrations of the reactants and the products remain constant
• Equilibrium achieved only in a closed system. If a product or reactant can escape into the surroundings or is deliberately removed from the system, equilibrium will not be reached.