what's chemical changes and physical change
Answers
Answer:
A physical change is any change in a substance's form that does not change its chemical makeup. Examples of physical changes are breaking a stick or melting ice. A chemical change, or chemical reaction, occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
Physical Change Chemical Change
No new substance is formed in a physical change. A new substance is formed in a chemical change.
A physical change is a temporary change A chemical change is a permanent change
A physical change is easily reversible. A chemical change is usually irreversible.
Very little energy (in the form of heat, etc.) is absorbed or given out in a physical change. A lot of energy (in the form of heat, light, sound, etc.) is absorbed or given out in a chemical change.