what is thermite reaction?with one example?
Answers
Answer:
A thermite reaction is basically iron oxide (rust) reacting with aluminum to produce molten iron. The products are aluminium oxide, elemental iron, and a large amount of heat. The reactants are commonly or thermite mixture is aluminum powder and iron oxide (rust) powder. When the mixture is heated, it starts reacting as the aluminum is more reactive than the iron and aluminium forms stronger and stable bonds with oxygen than iron.
Uses-
1.The reaction is used for thermite welding, often used to join rail tracks. 2.Thermites have extremely high temperature and also been used in metal refining, demolition of ammunitions, and in incendiary weapons.
3.Some thermite-like mixtures are used in fireworks.
4.A thermite reaction is used to purify the ores of some metals called as thermite process.
example--. Fe2O3 + 2Al ------) Al2O3 + 2Fe
Thermite reaction
Thermite is a pyrotechnic composition of metal powder, which serves as fuel, and metal oxide. When ignited by heat, 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.
Example.
For example, a copper thermite reaction using copper oxide and elemental aluminium can be used for creating electric joints in a process called cadwelding, that produces elemental copper (it may react violently): 3 CuO + 2 Al → 3 Cu + Al2O.