Question

When producing XY as shown in the equation, the total bond energy of the reactants is 732 kJ/mol and the total bond energy of the products is 1256 kJ/mol.
2X + Y2 --> 2XY
Is this reaction endothermic or exothermic? Why?

Answer 1

This reaction is exothermic because the total bond energy of the products (1256 kJ/mol) is greater than the total bond energy of the reactants (732 kJ/mol). This means that energy is released during the reaction, and the reaction releases 524 kJ/mol of energy.