3.1: Know that Chemical Reacts in Which Heat Energy is Given Out are Described as Exothermic, and those in Which Heat Energy is Taken In are Described as Endothermic

EXOTHERMIC	ENDOTHERMIC
Diagram showing Enthalpy Change during an Exothermic Reaction	Diagram showing Enthalpy Change during an Endothermic Reaction
DEFINITION: Reaction in which energy is given out to surrounding, decreasing energy level (temperature increases)	DEFINITION: Reaction in which energy is taken in from surrounding, increasing energy level (temperature decreases)
EXAMPLE: Burning Neutralisation Reaction between Water and Calcium Oxide	EXAMPLE: Electrolysis Thermal decomposition of Copper (II) Carbonate Reaction between Acetic Acid and Sodium Carbonate