A physical property of a substance can change if no chemical change occurs. Is this true?

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Temperature is one example of a physical property of a substance. If we heat the substance, no chemical change occurs but the temperature of the substance increases. So this is one case where we can have a physical change without a chemical change occurring.

There are two types of physical...

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Temperature is one example of a physical property of a substance. If we heat the substance, no chemical change occurs but the temperature of the substance increases. So this is one case where we can have a physical change without a chemical change occurring.

There are two types of physical properties: intensive properties which are a property of the material itself and do not depend on the amount of the material/substance present and extensive properties which depend on the amount of the substance present. Examples of intensive properties are density and color and examples of extensive properties are mass and volume.

Intensive properties do not change but it is possible for extensive properties to change and in fact they often do change in processes.

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A physical property of a substance has to do with a physical characteristic or state (solid, liquid, or gas) of that substance while a chemical property has to do with the substance’s chemical and molecular makeup.  Physical properties are easily observed whereas chemical are not. Examples of physical properties are: color, texture, shape, size, mass, current state, and so on. Examples of chemical properties are reactivity, flammability, heat of combustion, chemical stability, etc.

“Yes” is a simple answer to your question.  A physical property can easily be changed without changing the substance’s molecular composition. Take a piece of paper that has been torn for instance.  The paper’s shape and size, physical properties, have been changed. However, it is still the same kind of paper! - Molecularly there is no difference! 

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