Boiling water in a paper cup

Other Relevant Demos :

Simple conduction apparatus.

Thermal conductivity of wood and metal.

Relevant Resource questions :

Concepts demonstrated

Diagram of apparatus

Equipment needed :

Method for setting up apparatus :

Accessories (ie posters etc) :

Physics involved :

The heat produced by the bunsen burner is absorbed by the material on the wire gauze and is slowly transferred to the paper cup, hence heating the water. Because no flame strikes the cup and since the heating is slow the cup does not ignite.

It is the rate of transfer of the heat through the paper, rather than the boiling point fo the liquid, which causes the water to boil but does not cause the paper to burn.

How to use the Demonstration :

Everyday examples :

Things to do or add :

Other Comments :

Mail me for any comments.
This page last updated 13th June 1998 by Pal Fekete.

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