Description
A nice way to show how much heat water can hold.

Application
Specific Heat Energy

Theory
Paper is essentially composed of cellulose fibers which are very flammable. However, because water has a very high specific heat, this allows the water to absorb most of the heat. The cup remains well under its ignition temperature and does not ignite.

Materials
2 paper cups, non-wax coated burner or candle
Tongs water

Safety
Wear protective gloves and safety goggles
Normal open flame precautions should be taken.

Demonstration

Use the tongs to hold the paper cup over a flame. It should ignite within a few seconds and be rapidly consumed by fire. Drop the ashes in the sink or beaker of water.

Now hold an identical paper cup completely filled with water in the flame. After several minutes the paper may be scorched, but will not burn.

Disposal
Discard the wet paper cups and ashes in the trash can.

Reference
David Lee, Mt. Lakes HS; Pat Ruff, Watchung Hills HS