Given that the bond energy of N2 is 946 kJ/mole, the bond energy of O₂ is 498 kJ/mole and the NO bond energy is 631 kJ/mole, how much energy is required to react 1 mole of nitrogen molecules according to the following reaction? N2 + O₂ → 2 NO

Question

Quizplus · Accepted Answer

To calculate the energy required for the reaction, we first need to break the bonds in the reactants (N₂ and O₂), which requires adding energy, and then form the bonds in the products (2 NO), which releases energy. The energy required to break the bonds in the reactants is the sum of the bond energies of N₂ and O₂, which is 946 kJ/mole + 498 kJ/mole = 1444 kJ. The energy released by forming the bonds in the products is twice the bond energy of NO, because 2 moles of NO are formed, which is 2 * 631 kJ/mole = 1262 kJ. The net energy required is the energy to break the bonds minus the energy released by forming new bonds: 1444 kJ - 1262 kJ = 182 kJ.

Given That the Bond Energy of N2 Is 946 KJ/mole