Y8 Ch8 reactions

These flashcards cover key terms and concepts related to chemical reactions, including exothermic and endothermic reactions, conservation of mass, and types of chemical equations.

Exothermic reaction

A chemical reaction where energy is released into the surroundings. This results in a temperature increase. The energy needed to break bonds in the reactants is less than the energy needed to form bonds in the products.

Endothermic reaction

A chemical reaction where energy is absorbed from the surroundings into the reaction. This results in a temperature decrease. The energy needed to break bonds in the reactants is greater than the energy needed to form bonds in the products.

Bond energies

Energy needed to break a bond between atoms.

Conservation of mass

Mass of reactants equals mass of products.

Chemical reaction

A process that changes substances into new ones.

Balanced symbol equation

An equation showing equal amounts of reactants and products.

Combustion

Burning a fuel with oxygen to produce heat, CO₂, and water.

Thermal decomposition

A reaction where heat breaks down a compound.

Reactants

Substances that start a chemical reaction.

Products

Substances that result from a chemical reaction.