Secondary 2 – Chemistry: Exploring Energy Changes on Exothermic and Endothermic Reaction
Secondary 2 students conducted an experiment to explore exothermic and endothermic reactions. Using common household items such as baking soda, vinegar, water and sodium hydroxide, the students demonstrated their understanding of energy changes in chemical processes.
The activity took place in the school laboratory under the supervision of their teacher. The students worked in small groups, enthusiastically engaging with the materials to observe temperature changes during chemical reactions. Students mixed vinegar with baking soda to observe an endothermic reaction, noting the cooling effect as carbon dioxide gas was produced. Conversely, they added sodium hydroxide to water to witness an exothermic reaction, feeling the heat generated as the alkali dissolved.
This experiment aimed to deepen students’ understanding about Exothermic and Endothermic reactions. Exothermic reactions release heat, while endothermic reactions absorb it. By using accessible materials, the activity showcased practical applications of science in everyday life.
The hands-on approach made learning engaging and memorable. One student commented, “It’s amazing to see science come alive—feeling the temperature change was so cool!” The experiment successfully reinforced theoretical knowledge through real-world application. ***
