How are chemical changes different from physical changes?(1 point) Responses They form new substances. They form new substances. They include shifts in the phase of matter. They include shifts in the phase of matter. They are reversible. They are reversible. They involve heat.

Answer 1

The main difference between chemical changes and physical changes is that chemical changes result in the formation of new substances, while physical changes do not. Chemical changes involve the breaking and forming of new chemical bonds, leading to the creation of different molecules with distinct properties. In contrast, physical changes only involve a change in the physical state or appearance of a substance, such as a change in its shape or phase (solid, liquid, gas) without any alteration in its chemical composition. While both types of changes may involve heat, the involvement of heat is not exclusive to chemical changes.