Chemistry

Problem

The thermite reaction is represented by

2\text{Al}(s)+\text{Fe}_2\text{O}_3(s)\rightarrow2\text{Fe}(l)+\text{Al}_2\text{O}_3(s)\;\;\;\Delta H=-8.51\times10^{2}\,\text{kJ per reaction as written}

A mixture containing

10.0\,\text{g}

\text{Al}

and

15.0\,\text{g}

\text{Fe}_2\text{O}_3

is ignited. Assuming the reaction goes to completion, what quantity of heat is released? a)

-3.15\times10^{2}\,\text{kJ}

-8.00\times10^{1}\,\text{kJ}

+8.00\times10^{1}\,\text{kJ}

-1.60\times10^{2}\,\text{kJ}