For 13, please show me all the work, I'm trying to understand the concepts. For 14, can someone explain why its endothermic/the theory behind it?
13. Which of the following chemical equations is the formation reaction of Fe2O3(s) from its constituent elements in their standard states? The standard enthalpy of formation (AH) values are given in the table below Substance | Îãã(kJ/mol) Fe(s) 02(g) 03(g) Feo(s) Fe203(s) 142.7 -272.0 -824.2 A) 4 Fe(s) + 302(g)-> 2FesO3(s) B) 2 Fe(s) Xg) â Fe2O3(s) C) 2 Fe(s) + O3(g) â Fe2O3(s) D) Fe2O3(s) â 2 Fe(s) + O2(g) 2 14. Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the temperature of the resulting solution to fall. Which of the following statements is TRUE? A. The products have a lower potential energy than the reactants B. The reaction is exothermic C. Energy is released from the reaction. D. The reaction is endothermic E. The solution is endothermic