1.5 calculate the heat of reaction of the Hall-Heroult process, viz. A1,03 + 3C - 300 + 2A1 at 25C (298 K) from the following data: - 241 + 2 AlO3i = -7,400 cal (-30,962 J) per g of A1 reacted. AH 298 C + 302 = CO; 9 440 298 -2,250 cal (-9,414 J) per g of C reacted. Atomic weights of an and C are 27 and 12 respectively. vely)