The decomposition of 57.0 g of fe2o3 results in consider the following reaction. 2fe2o3 > 4fe + 3o2 deltah degree rxn = + 824.2 kj decomposition of 57.0 g of fe2o3 results in the release of 294 kj of heat. a. the absorption of 23500 kj of heat. b. the absorption of 147 kj of heat. c. the absorption of 294 kj of heat. d. the release of 23500 kj of heat. e. the release of 147 kj of heat.