Edit Delete - Last Modified By: awo at 14/07/2014 12:10:12 PM
Activity
1 Practical Work Title: Expansion and
heatPurpose
To observe how
heating a gas causes it to expand.
This
practical activity requires that you wear safety glasses
Materials
- glass bottle
- hot tap water
- balloon
Procedure
1 Fill the glass
bottle with hot tap water.
2 Pour out the hot
water and quickly stretch a balloon over the mouth of the bottle.
3 Let the bottle
cool or place it in a tub of cool water and observe what happens.
Results
Construct a series
of diagrams that shows what happened.
Discussion
1 a State
whether this is a chemical or physical change.
b Justify your answer.
2 Use the terms expansion
and contraction to describe your observations.
3 Describe what is happening inside the
balloon using the particle model.