After a bit of cleaning the slag off, a solid, durable weld is left behind. The official name for this process is ‘exothermic welding‘, and it has been in use since the 19th century.

While you're watching, look out for the different household items which can be used for exothermic and endothermic reactions. A Bunsen burner flame is produced by burning methane gas. The ...

Iron oxide, aluminum, and a catalyst are placed in a flowerpot. The reaction is extremely exothermic resulting in molten iron and aluminum dripping into sand below the flowerpot. The demonstration ...

But first, let's try one more exothermic reaction ... which was used in the past to weld railway lines together. We managed to generate enough heat in our thermite reaction to weld two pieces ...