This Demonstration of the 2nd Law of
Thermodynamics is reversible!
Bring the 2nd Law of Thermodynamics to life using
this device that can act as a refrigerator or a heat engine. Immerse the two
aluminum legs in baths of different temperatures, and produce electrical energy
that turns the turbine! Unplug the banana jacks and measure the voltage output
with a multimeter.
Next, see it in reverse! Connect a battery or DC
power source to the two jacks. One leg will heat up while the other cools down.
Measure its efficiency and compare it to the Carnot Efficiency. Too cool!