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What is the difference between physical and chemical changes?
What is an example of a physical change?
What is a physical change?
Do chemical changes form and not identity in a physical change?
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. Learn the examples, categories and criteria of physical changes and how to distinguish them from chemical changes.
Aug 12, 2022 · A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. When liquid water is heated, it changes to water vapor.
Learn how to distinguish between physical and chemical changes based on the changes in chemical bonds and intermolecular forces. See examples of physical and chemical changes and how to identify them with questions and comments.
- 7 min
- Sal Khan
- Well if you define 'changing' as reacting in chemical reactions or undergoing physical state transitions, then no, there certain chemicals which do...
- This belongs in the tips and thanks section :)
- This isn't a question, it belongs in tips and thanks instead.
- help me understand how to identify a physical and chemical change
- A physical change is characterized by its effects on the intermolecular bonds between molecules. In this case, the heat results in the molecules ga...
- Very simply, chemical changes result in the starting chemicals changing into new chemicals. While physical changes do not see a change in the ident...
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
Sep 20, 2022 · A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. Physical changes can further be classified as reversible or irreversible. The melted ice cube may be refrozen, so melting is a reversible physical change.
Jan 17, 2019 · A physical change is a change in matter that alters its form but not its chemical identity. The size or shape of matter often changes, but there is no chemical reaction. Phase changes are physical changes. These include melting, boiling, vaporization, freezing, sublimation and deposition.
2 months ago. A physical change isn't always affected by a chemical change or vise versa. However, a chemical change may produce energy that might affect the physical properties of a material. For example, wood burning (chemical) generates heat, which boils water (physical) or a detonated bomb (chemical) may crack glass windows (physical).
- 5 min
- Sal Khan
