Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown. 2HBr → H2 + Br2 The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol. What is the total energy of the reaction? Is this reaction endothermic or exothermic? (1 point) Responses 102 kJ/mol, exothermic 102 kJ/mol, exothermic –102 kJ/mol, endothermic –102 kJ/mol, endothermic 102 kJ/mol, endothermic 102 kJ/mol, endothermic –102 kJ/mol, exothermic
To find the total energy of the reaction, we need to calculate the difference between the energy of the reactant and the energy of the products.
Total energy of the reaction = Energy of the reactant - Energy of the products
Total energy of the reaction = 732 kJ/mol - 630 kJ/mol
Total energy of the reaction = 102 kJ/mol
Since the total energy of the reaction is positive (102 kJ/mol), it means that energy is released during the reaction. Therefore, the reaction is exothermic.
The correct answer is "102 kJ/mol, exothermic".