The standard heat of combustion of Al is – 837.8 kJ mol-¹ at 25°C. If Al reacts with O₂ at 25°C, which of the following release 250 kJ of heat?
A. the reaction of 0.624 mol of Al
B. the formation of 0.624 mol of Al₂O₃
C. the reaction of 0.312 mol of Al
D. the formation of 0.150 mol of Al₂O₃
