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Thermit Reaction

What happened when the thermit black mixture was ignited? A great deal of sparks, flames, and smoke were produced almost as soon as the thermit was lit. Molten iron could also be seen. The reaction was quick and did not last very long.

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Thermit Reaction

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  1. What happened when the thermit black mixture was ignited? • A great deal of sparks, flames, and smoke were produced almost as soon as the thermit was lit. Molten iron could also be seen. The reaction was quick and did not last very long. • What is the difference between an endothermic and exothermic reaction? • An endothermic reaction absorbs heat from the surroundings, using heat as a reactant. An exothermic reaction released heat to the surroundings, using heat as a product. • Was the thermit endothermic or exothermic? Justify your answer. • The thermit reaction was exothermic, because a great amount of heat, mostly in the form of flames and sparks, that was released after the thermit was ignited. • Thermit black is a mixture of iron III oxide and fine aluminum powder. Write a balanced equation for the reaction that occurred between them when the thermite was lit. Include heat on the correct side of the equation. • Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(s) + heat Thermit Reaction

  2. Write the half reactions for the thermit rxn. • Use standard enthalpies of formation to calculate the standard enthalpy change for the thermite reaction. • Is the reaction spontaneous?ΔS = −38.6 J/mole K T=2200˚C Justify your answer. • Sketch the energy diagram • What is the purpose of the thermit igniting stick? Thermit Reaction

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