If, when electrolyzing water (2H2O -- 2H2 + O2), 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?

Question

If, when electrolyzing water (2H2O --> 2H2 + O2), 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?

Anonymous · Accepted Answer

Looks like you had to put in 2000 - 934 kJ so it is endothermic You could have guessed that because when the Hindenberg burned H2 and O2 combined the other direction and heat was released.

bob kid · Answer

I forgot the answer choices 1066kJ, exothermic -1066kJ, exothermic -1066kJ, endothermic 1066kJ, endothermic

bob kid · Answer

the negative or positive one?

bob kid · Answer

oh wait it would be the positive one

DrBob222 · Answer

delta H reaction = (bond energy reactants - bond energy products) Note that this is for gas reactions only.