Question 5
How do we see energy conservation in real life? Carry out the following experiment to find out. Work in pairs. Using a funnel, add 1 tablespoon of baking soda into a balloon. Carefully pour 60 ml of vinegar into a 500-ml plastic bottle. Gently stretch the balloon to open it up, then pull its neck over the rim of the plastic bottle. Be careful not to let the baking soda fall into the bottle yet (Figure 8.6). When ready, lift the balloon such that the baking soda falls into the vinegar.
Hold the bottle. Does it feel warmer, colder or the same? Why?
Hold the bottle. Does it feel warmer, colder or the same? Why?
