Chemical changes and physical changes differ in several ways:
1. Forming new substances: Chemical changes result in the formation of completely new substances with different chemical properties, whereas physical changes do not produce new substances.
2. Reversibility: Physical changes are typically reversible, meaning that the original substance can be recovered through a physical process, whereas chemical changes are often irreversible and cannot be easily reversed.
3. Involvement of heat: Although both chemical and physical changes can involve the addition or removal of heat, the involvement of heat is not a defining characteristic of either type of change. Chemical changes can occur with or without the addition or removal of heat, while physical changes can also involve changes in temperature.
4. Shifting of matter: Chemical changes involve a rearrangement of atoms and molecules, resulting in a change in the composition of matter. Physical changes, on the other hand, do not cause a rearrangement of atoms or molecules, but rather a change in the physical state or appearance of the substance, such as changes in size, shape, or phase (solid, liquid, gas).
In summary, chemical changes involve the formation of new substances, are often irreversible, and cause a rearrangement of atoms and molecules, while physical changes involve changes in the physical state or appearance of a substance and are typically reversible.
How are chemical changes different from physical changes?, they involve heat, they form the substances, they are reversible, they include shifts and the phase of matter
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