Exothermic and Endothermic Reactions

Image Source

Learning Intention: Students will understand the meaning of exothermic and endothermic reactions.

Success Criteria: Students will be able to identify exothermic and endothermic reactions and give examples of each. They will be able to explain why these processes to considered to be exothermic or endothermic.

Endothermic reactions absorb energy, causing a decrease in temperature (eg. photosynthesis, melting and evaporation all require energy to be added to the system). Exothermic reactions release energy, causing an increase in temperature (Combustion, freezing, and condensation release energy from the system).

Mr Kent’s Chemistry page has some excellent examples of exothermic and endothermic processes and chemical reactions. We will be conducting four experiments in class and measuring the temperature change to determine which are endothermic and which are exothermic reactions. Leave comment below about what you found from your experiments. Can you think of any examples of exothermic and endothermic processes from home?