3.5C: Draw and Explain Energy Level Diagrams to Represent Exothermic and Endothermic Reactions

EXOTHERMIC	ENDOTHERMIC
Diagram showing the Enthalpy Change during an Exothermic Reaction	Diagram showing the Enthalpy Change during an Endothermic Reaction
DEFINITION: Reaction in which energy is given out to surroundings, decreasing energy level (temperature increases)	DEFINITION: Reaction in which energy is taken in from surroundings, increasing energy level (temperature decreases)
EXPLANATION: During an exothermic reaction, energy is given out to surroundings Therefore, the energy of products will be lower than the energy of reactants, having -△H (this is represented in energy-level diagram above)	EXPLANATION: During an endothermic reaction, energy is taken in from surroundings Therefore, the energy of products will be higher than the energy of reactants, having +△H (this is represented in energy-level diagram above)