Chapter 7, Problem 20E

Thermite mixtures are used for certain types of welding, and the thermite reaction is highly exothermic.
$\begin{array}{l}F{e}_2{O}_3\left(g\right)\text{+}2A{I}_2{O}_3\left(s\right)\to 2Fe\left(s\right)\\ △r{H}^{°}=-852{\text{ kJ mol}}^{\text{-1}}\end{array}$
1.00 of granular $F{e}_2{O}_2$ and 2.00 molof AI are mixed at room temperature $(25°C)$ , and a reaction is initiated. The liberated heat is retained within the products, whose combined specific heat capacity over a broad temperature range is about $0.8{\text{ J g}}^{-1}°C^{-1}$ (The melting point of iron is 1530 °C.) Show that the quantity of heat liberated is more than sufficient to raise the temperature of the products to the meting point of iron.