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The Thermit process is used for repairing cracks in railway tracks on site.
(a) Write the equation for the reaction taking place in the process, mentioning the physical states of the reactants and products.
(b) What information in the chemical equation indicates that the reaction is exothermic?
Answer:
(a)
- The thermite process is an exothermic reaction where the heat evolved is even able to melt metal (Fe) in this case.
-
The chemical reaction is given by:
2Al (s) + Fe2O3 (s) ----> 2 Fe (l) + Al2O3 (s)
(b) Since, the iron formed is in the molten (liquid) state , we know that heat is generated in the reaction.
