Column A
1. How much energy is needed to break the Br-Br single bond in Br2? - a. 193 kJ/mol
2. How much energy is needed to break the H-H single bond in H2? - a. 193 kJ/mol
3. What is the combined energy absorbed for the reactant side of the equation? (Hint: add up the energies needed to break the bonds in H2 and Br2) - e. 732 kJ/mol
4. What is the total amount of energy released when forming the 2 H-Br bonds of the product? - f. 435 kJ/mol
5. What is the total energy of the reaction? (Use the formula: Total bond energies of reactants - Total bond energies of products) - g. -104 kJ/mol
6. Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic? - c. Exothermic