When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown. H2 + I2 → 2HI What is the total energy of the reaction? Is this an endothermic or exothermic reaction? (1 point) Responses –9 kJ/mol, exothermic –9 kJ/mol, exothermic 9 kJ/mol, exothermic 9 kJ/mol, exothermic –9 kJ/mol, endothermic –9 kJ/mol, endothermic 9 kJ/mol, endothermic

Question

When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown. H2 + I2 → 2HI What is the total energy of the reaction? Is this an endothermic or exothermic reaction? (1 point) Responses –9 kJ/mol, exothermic –9 kJ/mol, exothermic 9 kJ/mol, exothermic 9 kJ/mol, exothermic –9 kJ/mol, endothermic –9 kJ/mol, endothermic 9 kJ/mol, endothermic

Answer 1

The total energy of the reaction can be determined by subtracting the energy of the reactants from the energy of the products:

Total energy of the reaction = Energy of the products - Energy of the reactants
= 590 kJ/mol - 581 kJ/mol
= 9 kJ/mol

Since the total energy of the reaction is positive (9 kJ/mol), this indicates that energy is absorbed during the reaction. Therefore, the reaction is endothermic.