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Thermite mixtures are used for certain types of weldings and the thermite reaction is highly exothermic. Given delta H= -852 KJ/mol, 1 mole of granular Fe2O3 and 2 moles of granular aluminum are mixed at room temperature and the reaction is initiated. the liberated heat is retain within the products whose combined specific heat over a broad temperature range is about 0.8 J/g C . the melting pt. of Fe is 1530 C. show that the quantity heat liberated is more than sufficient to raise the temp. of the products to the melting pt. of Fe.
Fe2O3 + 2Al - Al203 + 2Fe

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