Fireproof Balloon
Balloons are rather fragile and can easily be punctured by a sharp object. Flames from fire can weaken the rubber and cause it to burst. However, in this experiment you will find out how you can hold a balloon directly in a flame without breaking the balloon. We advise that an adult handle the matches and the flame.MATERIALS:
- Two round balloons, not inflated
- Several matches
- Water
- Inflate one of the balloons and tie it closed.
- Place 1/4 cup of water in the other balloon, and then inflate it and tie it shut.
- Light a match and hold it under the first balloon. Allow the flame to touch the balloon. What happens?
- Light another match. Hold it directly under the water in the second balloon. Allow the
flame to touch the balloon. What happens with this balloon?
WHAT THIS MEANS:
Why does the balloon with no water break in the flame? The flame heats whatever is placed in it. It heats the rubber of both balloons. The rubber of the balloon without water becomes so hot that it becomes too weak to resist the pressure of the air inside the balloon. How does the balloon with water in it resist breaking in the flame? When water inside the balloon is placed in the flame, the water absorbs most of the heat from the flame. Then, the rubber of the balloon does not become very hot. Because the rubber does not become hot, it does not weaken, and the balloon does not break.
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