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The Highly Exothermic Thermite Reaction, in Which Aluminum Reduces Iron(III)

Question 90

Multiple Choice

The highly exothermic thermite reaction, in which aluminum reduces iron(III) oxide to elemental iron, has been used by railroad repair crews to weld rails together. 2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s) ΔH°rxn= -847.6 kJ/mol
What mass of iron is formed if 725 kJ of heat are released?


A) 23.9 g
B) 47.8 g
C) 65.3 g
D) 95.5 g
E) 112 g

Correct Answer:

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