Give two examples of exothermic reactions?
Combustion
Neutralisation
If the reactants have more energy than the products, what kind of reaction must have taken place?
Exothermic reaction
If the reactants have less energy than the products, what kind of reaction must have taken place?
Endothermic reaction
What is an endothermic reaction?
One that takes in energy from the surroundings, usually in the form of heat and usually shown by a fall in temperature of the surroundings