Define thermite mixture
Answers
Thermite reaction involves reduction of the metal oxide by metal. The metal should have lower reduction potential than the metal in oxide form. Aluminium is chosen as metal since it has strong affinity towards oxygen and its oxide, Al2O3 is a highly exothermic compound.
A common thermite contains ferric oxide and aluminium in 3:1 ratio by mass. It is used in thermite welding of broken iron parts. The reduction of ferric oxide by aluminium is highly exothermic and therefore the iron formed will be in the molten state.
Fe2O3 + 2Al --------> Al2O3 + 2Fe + heat
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Answer:
The thermite reaction is the reaction of metal oxide with the aluminium. The aluminium acts as a reducing agent and the reaction is highly exothermic and hence called a thermite reaction. The aluminium reduces the oxide of another metal, most of the times, it is iron oxide (FeO) because aluminium is highly reactive.