If, when electrolyzing water (2H20 -> 2H2 + 02), the total bond energy of the reactants is 2000kJ and the total bond energy of the products is 934kJ, what is the total energy of the reaction and is this an endothermic or exothermic reaction?
The total energy of the reaction can be calculated by subtracting the total bond energy of the reactants from the total bond energy of the products:
Total energy of reaction = Total bond energy of products - Total bond energy of reactants
Total energy of reaction = 934 kJ - 2000 kJ
Total energy of reaction = -1066 kJ
Since the calculated value is negative, the total energy of the reaction is -1066 kJ. This indicates that the reaction releases energy, making it an exothermic reaction.