Answer:
The total energy of the reaction can be calculated by finding the difference between the energy of the reactants and the energy of the products.
In this reaction, the energy of the reactants is given as 732 kJ/mol, which means that it takes 732 kJ of energy to break all the bonds in the reactants.
The total bond energy of the product side is given as 1256 kJ/mol, which means that it takes 1256 kJ of energy to break all the bonds in the products.
To find the total energy of the reaction, we can subtract the energy of the reactants from the energy of the products:
Total energy of the reaction = energy of the products - energy of the reactants
= 1256 kJ/mol - 732 kJ/mol
= 524 kJ/mol
The total energy of the reaction is 524 kJ/mol, which means that 524 kJ of energy is released during the formation of 2 moles of XY from 2 moles of X and 1 mole of Y2. The negative sign is not included because the reaction is exothermic and energy is being released.