I've been having trouble understanding some parts of these questions. The question goes like this: The "thermite reaction" is highly exothermic. It involves the reaction between Fe2O3 & Al. The reaction produces white-hot, molten iron is a few seconds. 2 Al + 3/2 O2 --> Al2O3 delta H = -1672 kJ 2 Fe + 3/2 O2 --> Fe2O3 delta H = -836 kJ a) find the amount of heat liberated in the reaction of one mole of Fe2O3 with Al. b) find the amount of heat liberated in the reactino of 1 kg of Fe2O3 with Al. c) how many grams of liquid water could be heated from 0C to 100C by the heat liberated per mole of aluminum oxide? For a) and b), when I'm trying to find the enthalpy, do I need to apply hess's law to obtain the enthalpy of one mole of Fe2O3 and Al? The part that confuses me is the relevance with Fe2O3 and Al. So far, I've only gotten to figuring out what the target eq'n is. 2 Al + 2 Fe --> Al2O3 + Fe203 delta H = -836kJ But after determining the target eq'n, I don't know what to do in terms of Fe2O3 and Al for that one mol and similarly with determining 1 kg.