Determine the heat of reaction of the following chemical reaction using the standard heats of formation from the table in the Chemistry B Information Sheet. Show all of
your work. Then classify each reaction as endothermic or exothermic.
C2H5OH (1) + 3 O2 (g) → 2 CO2 (g) + 3 H20 (1)

c. is the answer

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.