Question

why is there a change in energy during chemical reactions? (1 point)
chemical bonds are formed and broken, which absorbs energy.
energy is released by the breaking of chemical bonds, and energy is absorbed when the bonds are formed.
chemical bonds are formed and broken, which releases energy.
energy is released by the formation of chemical bonds, and energy is absorbed when the bonds are broken.

Explanation:

Chemical reactions involve two key processes: breaking existing chemical bonds and forming new ones. Breaking bonds requires an input of energy (absorption) to overcome the attractive forces between atoms, while forming new bonds releases energy as atoms achieve a more stable, lower-energy state. The overall energy change of a reaction is the difference between the energy absorbed for bond breaking and the energy released for bond formation.

Answer:

Energy is released by the formation of chemical bonds, and energy is absorbed when the bonds are broken.