What is the thermite reaction? Explain its use and give an equation.

Hint: Thermite is a pyrotechnic composition of metal powder and metal oxide. The reaction is also called the Goldschmidt process or Goldschmidt reaction. Thermites have diverse compositions. The reaction creates so much heat that the iron generated is melted.

Complete step by step answer:
The thermite reaction is an exothermic reaction between the metal and metal oxide. When ignited by heat, the thermite undergoes an exothermic reduction-oxidation reaction. Most varieties are not explosive, but can create brief bursts of heat and high temperature in a small area. Thermites have diverse compositions. Fuels include aluminium, magnesium, titanium, zinc, silicon, and boron. Aluminium is common because of its high boiling point and low cost.
aluminium with the metal oxides, where aluminium acts as a reducing agent. Your metal oxide is iron oxide, more commonly known as rust. During the reaction, a large amount of energy is released. This heat (energy) is so extreme that thermite reactions can be used to weld other metals together.
${Fe_2O}_3 + 2Al \to 2Fe + {Al_2}{O_3} + heat$
Use of the thermite reaction:
The reaction is used for thermite welding, often used to join railway tracks,, metal refining, disabling munitions, and incendiary weapons.
Additional Information: The first commercial application of thermite was the welding of tram tracks in Essen in 1899. Types of thermite reaction- Iron thermite, Copper thermite and Thermates.

Note:
The thermite (thermit) reaction was discovered in 1893 and patented in 1895 by German chemist Hans Goldschmidt. Goldschmidt was originally interested in producing very pure metals by avoiding the use of carbon in smelting, but he soon discovered the value of thermite in welding.