Question

Recall that chemical reactions occur when atoms from reactants rearrange to form
products. You also learned that the atoms in a molecule are joined by chemical bonds.
The change in energy in a chemical reaction depends on the changes in the groupings
of the atoms involved. For groupings of atoms to change, the bonds between them
must change. Energy is absorbed in a chemical reaction when bonds between atoms
break. Energy is released when the bonds between atoms form.
In many reactions, chemical bonds both break and form. The overall energy change in
these reactions depends on whether more energy is absorbed or released when bonds
break and form.

Question: How do you think the energy of the bonds forming compares to the energy of bonds breaking in this reaction?

Answer 1

Answer:

How is it possible that the reactants and products for both chemical equations have the same quantity of carbon, hydrogen, and oxygen atoms, yet the reactants and products are different molecules? ... They're opposite of each other / they create a cycle / each one uses the products produced by the other.

Three things must happen for a reaction to occur.

Molecules must collide.

Molecules must collide with enough energy to begin to break the old bonds so new bonds can form. ( Remember activation energy)

Molecules must collide with the correct orientation.

The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction

this what I understood.... hope it helps you in other ways...... have a good day m.