Observe both an exothermic and an endothermic reaction/process as I use a modified propane torch in the video demonstration.
In Chemical Mystery #10, plastic straws are observed to “magically” change color when waved in the air. Check out the explanation and the video.
Endothermic and exothermic reactions and processes are a common topic in chemistry class. This activity provides examples that can be done with household materials.
Make ice cream in a baggie to emphasize energy changes, direction of energy transfer, dissolution and colligative properties.