The thermite reaction in which aluminum metal reacts with iron(III) oxide to produce a spectacular display of sparks, is therefore exothermic that the product (iron) is in the molten state
2Al(s) + Fe2O3(s) right arrow Al2O3(s) + 2Fe(l)
Delta H = -202.9 kcal/mol
How much heat (in kilocalories) is released when 3.14 g of Al is used in the reaction?