How is a chemical change different from a physical change?

Answer 1

a physical change can be reversed a chemical one can't
A chemical change is when a new substance, with new and different properties, is produced. The identity of the original substance is changed. In contrast, a physical change is when one or more of a substance's physical properties have simply been altered; no new substance is produced.

Answer 2

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.

Answer 3

A physical change is a change in the state, shape or size of matter without a change in its composition while chemical change occur when one or more new substances are formed. That's all! Hope it's helpful. :)

Answer 4

Physical change is the change in which only physical properties changes ,like color, hardness, density etc. Chemical changes affect the composition as well as chemical properties of matter and result in formation of new substance.

Answer 5

Chemical Changes the substance and physical really dont change it as much examples of chemical: burning wood, physical: painting it Physical is basically changing color, looks,

Answer 6

chemical changes change the properties of the substance such as burning it..

physical changes dont such as cutting it in half..