Question

which fact must be true if a relationship is endothermic? (1 point)
more bond energy is absorbed on the reactant side than released on the product side.
more energy is needed to form the bonds on the product side than to form the bonds on the reactant side.
the bond energy released by breaking the bonds in the reactants is greater than the bond energy used to form the products.
the energy of each bond on the reactant side is greater than the energy of each bond on the product side.

Explanation:

In an endothermic reaction, energy is absorbed. This means that more energy is required to break the bonds in the reactants than is released when the bonds in the products are formed. In other words, more bond - energy is absorbed on the reactant side than released on the product side.

Answer:

More bond energy is absorbed on the reactant side than released on the product side.