(4F30.10) Stirling Engine
The Stirling Engine is a piston that, when heated or cooled, increases or decreases the pressure/energy of the gas trapped inside. This causes the gas molecules to apply more pressure on the piston. This in turn increases the pressure on the opposite side of the piston, and the cycle repeats. As long as heat is allowed to flow (be it from a cold or hot source) the gas pressure variance will drive the piston.
To set up the demonstration, place the beaker of water on the hot plate and the stirling engine on the beaker. Turn the hot plate on to 300C. It will take approximately 21 minutes for the water to boil. If the stirling engine does not begin to spin on its own, give it a small spin.