kJ of heat released

Question

In a popular television series, the two characters use thermite to assist with breaking into a chemical storage facility because the reaction between aluminum and iron(III) oxide produces a tremendous amount of heat. If they began with 10.0 g of Al, how many kJ of heat would be released?

2 Al(s) + Fe₂O₃(s) à 852 kJ + Al₂O₃(s) + 2 Fe(s)

Answer 1

2 Al(s) + Fe₂O₃(s) ------> 852 kJ + Al₂O₃(s) + 2 Fe(s)

10 g Al x 1mol Al / 26.98 g Al x 852 kJ / 2 mol Al = 158 kJ

from the balanced equation 2 mol Al will release 852 kJ of heat. The above calculation shows 10 g Al can release 158 kJ of heat