Which statement best describes the energy change during product formation?

Which statement best describes the energy change during product formation?

• A. It weakens bonds
• B. It absorbs energy to form bonds
• C. It strengthens bonds and releases energy
• D. It has no effect

Answer: (C)

When products form, new chemical bonds are created between atoms. Those new bonds are typically stronger and more stable than the bonds that were broken to reach the product state, so the system ends up in a lower energy configuration. That release of energy is the hallmark of bond formation, making the energy change exothermic. So describing the process as strengthening bonds and releasing energy best fits what happens during product formation. If energy had to be absorbed to form bonds, or if there were no energy change, that would not align with how bond making usually releases energy when stable products are produced.

When products form, new chemical bonds are created between atoms. Those new bonds are typically stronger and more stable than the bonds that were broken to reach the product state, so the system ends up in a lower energy configuration. That release of energy is the hallmark of bond formation, making the energy change exothermic. So describing the process as strengthening bonds and releasing energy best fits what happens during product formation. If energy had to be absorbed to form bonds, or if there were no energy change, that would not align with how bond making usually releases energy when stable products are produced.