Thermal Conductivity In Water

Purpose

To demonstrate that water is a poor conductor of heat.
 

Equipment

Dewar of water, immersion heater, digital thermometer.

 

Setup Time

5 min.
 

    Images

    i2-26

    Description

    An immersion heater placed at the top of a dewar of water causes the water near the top of the dewar to boil.However, heat is not readily conducted through the water to the bottom, and the bottom remains at a much lower temperature even 15-20 minutes after the water on top begins to boil. ◙