A physical change is one in which no chemical reaction has taken place, so the physical properties before the change are the same as they are after the change. Physical changes include phase changes and dissolving.
Water is, chemically, H2O whether it is in a solid , liquid, or gas state; it only has changed forms, not the actual element that it is. This is an example of physical change.
Chemically iron reacts with oxygen to form rust, which has merged the two elements and has created a reaction. This is an example of chemical change.
Answer
There are two possible definitions for Physical and Chemical changes which I use in school:
1. A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change - you can't 'unburn' it
2. A physical change is a change in which no new substance is formed; a chemical change results in the formation of one or more new substances. Again, consider the previous examples: Freezing water into ice just results in water molecules which are 'stuck' together - it's still H2O. Whereas burning wood results in ash, carbon dioxide, etc, all new substances which weren't there when you started.
an example of physical change would be tearing a paper up.
whereas a chemical change would be burning the paper.
A change for the state of matter can occur.
Chemical broooooooooooooooo niga
it is a chemical change
Chemical I think
physical as the chemical structure does not change.
Physical - there are no chemicals involved
Chemical broooooooooooooooo niga
it is a chemical change
Chemical I think
physical as the chemical structure does not change.
A physical change
Physical - there are no chemicals involved
Chemical change
Itβs a physical change π
physical change
It's a physical change why are some people f$#@%ing stupid and saying a chemical change??
Physical change of the paint, not the door.
Melting is a physical change.