How are chemical changes different from physical?

Answer 1

So, physical can be changed back to the original state... Chemical cannot (unless you use another chemical change)

So, melting freezing vaporizing and condensation are physical changes. Chemical is like burning something, or adding a reactive compound/ solution and there being a color change, vapor or smell.

There is a bit more to it, but that's the basics.

Answer 2

Chemical changes involve the formation of new substances with different chemical properties, while physical changes do not involve a change in the chemical composition of the substance. Chemical changes are usually irreversible, while physical changes are often reversible by changing the conditions.

Answer 3

So, physical can be changed back to the original state... Chemical cannot (unless you use another chemical change)

So, melting freezing vaporizing and condensation are physical changes. Chemical is like burning something, or adding a reactive compound/ solution and there being a color change, vapor or smell.

There is a bit more to it, but that's the basics.

Answer 4

A chemical reaction changes the actual substance like when you burn paper you make it ash. A physical change is one where the actual substance doesn't change when you freeze water into ice it's still water just in solid form. (phase changes are physical not chemical changes)