Asked by bob kid

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?
Answered by bob kid
I forgot the answer choices
1066kJ, exothermic
-1066kJ, exothermic
-1066kJ, endothermic
1066kJ, endothermic
Answered by Anonymous
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.
Answered by bob kid
the negative or positive one?
Answered by bob kid
oh wait it would be the positive one
Answered by DrBob222
delta H reaction = (bond energy reactants - bond energy products)
Note that this is for gas reactions only.
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