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?
Responses
–9 kJ/mol, exothermic
9 kJ/mol, endothermic
9 kJ/mol, exothermic
–9 kJ/mol, endothermic
To calculate the total energy of the reaction, we need to find the difference between the energy of the reactants and the energy of the products.
Total energy = Energy of products - Energy of reactants
Total energy = 590 kJ/mol - 581 kJ/mol
Total energy = 9 kJ/mol
Therefore, the total energy of the reaction is 9 kJ/mol.
Since the total energy of the reaction is positive (9 kJ/mol), it means that more energy is released during the formation of the products compared to the energy absorbed during the breaking of the reactant bonds. This indicates that the reaction is exothermic.
So, the correct answer is 9 kJ/mol, exothermic.