What are exothermic reactions? Give on suitable example
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Examples are numerous: combustion, the thermite reaction, combining strong acids and bases, polymerizations. As an example in everyday life, hand warmers make use of the oxidation of iron to achieve an exothermic reaction:
4Fe + 3O2 → 2Fe2O3 ΔH⚬ = - 1648 kJ/mol.
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Explanation:
The burning of hydrogen in hydrogen-oxygen fuel cells is a type of exothermic reaction as it undergoes combustion and produces an electric charge. The burning of natural gas methane is also an example of an exothermic reaction.
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