The behavior of Matter - Contraction
Solids, liquid, and gases all expand when they are heated. Similarly, when substances are cooled they contact as the particles move closer together.
The Imploding Can
Aim:
To observe contraction in gases.
Hypothesis:
It will explode.
Equipment:
Bunsen burner, Tongs, Ice cream container, Can, Safety glasses, heatproof mat.
Method:
1. Set up a Bunsen burner underneath a tripod and gauze mat.
2. Pour approximately 50-60 mL of water into your can. It should be no more than 1/4 full.
3. Heat the can of water until steam is seen escaping from the top.
- Carefully grip the can with the scissor tongs. Ensure you have a firm hold of the can before lifting it off the gauze mat.
4. Quickly, but very' carefully, invert the can as you plunge it into a container of water.
Observation:
The water was boiling because of the heat and the can squeeze up.
Explanation:
The can suddenly squeeze up because the particles starting to move around when it's heated but when you put it in cold water the particles will stop moving.
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