How is a physical change different than a chemical change?

Answer 1

A physical change is different than a chemical change, because in a physical change, the composition of the matter did not change. While in a chemical change, the composition of the matter did change.

SO basically, the composition of the matter does not change is the difference between a physical change and a chemical change.
yes

Answer 2

In a physical change, the substance's molecular composition remains the same, only its physical properties change (e.g., state of matter, shape). In a chemical change, the substance undergoes a chemical reaction that alters its molecular composition, resulting in the formation of new substances.

Answer 3

a physical change is reversible but a chemical change is not

or


a physical change is a change in which no new substance is formed; a chemical change is were one or more substances are formed

Answer 4

Physical change is when something simply changes its appearence, shape, or/and size. For example, if I cut up a piece of paper, it's still paper, right? If a t-shirt shrunk in the washer, it's still a t-shirt.

Chemical change is when something happens to an object and you can't change it back. For example, if you burnt some wood, it's gone. Once you burn it all, it turns into smoke. That's chemical change.

Hope this helped.
A physical change can be easily reversed, and no new substance is formed from it. The state of matter is usually changed.

e.g. ice cube melting

A chemical change cannot be reversed, and a new substance is formed. The change is at a molecular level - bonds between atoms are broken and new bonds are formed between different atoms (a rearrangement of atoms).

e.g. metal rusting

What differs Physical change from Chemical change is that a physical change is a change in state of matter, cutting, etc. But it does not make a new substance. A Chemical change is whenever something burns, tarnishes or if you mix 2 substances and get a new one, that is a chemical change. hope that helps.

Answer 5

the difference is that : 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. Where as burning wood results in ash, carbon dioxide, etc, all new substances which weren't there when you started.

OR

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 .

Answer 6

Physical changes are those that do not change the chemical identity of a substance. Examples include changes of state, shape, and size. Chemical changes, on the other hand, involve the breaking and reforming of bonds between atoms. In this process, different chemical identities are formed. For example, a chemical change occurs when metals rust; this is an example of oxidation.

Answer 7

A physical change occur when the molecular structure of chemicals are not changed.
A chemical change occur when the molecular structure of chemicals is changed.
Grinding is physical, neutralization of an acid is chemical.

Answer 8

A physical change is where the individual elements are not changed, but a chemical change is where a new substance is formed.

Answer 9

physical changes can be not permanent like solid-liquid-vapour

chemical changes are permanent if not reversible

Answer 10

During a physical change the chemical composition is not changed.