Some steel wool is put in a test tube containing a small quantity of sulfur. As the test tube is heated, the following reaction will occur:
Fe + S → FeS
During the heating, a loud whistle can be heard. This is a physical phenomenon known as a thermoacoustic engine or a Rijke tube. The whistle is produced by ascending air inside the tube.
Safety:
- During heating, toxic sulfur vapors may escape and ignite.
Post time: Feb-26-2017