Physical versus Chemical Properties. What is a property? Property: a characteristic of a substance that can be observed.

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Presentation transcript:

Physical versus Chemical Properties

What is a property? Property: a characteristic of a substance that can be observed

Physical Property Physical property: a property that can be observed without changing the identity of the substance.

Special Physical Properties Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure water = 100 o C

Special Physical Properties Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure water = 0 o C

Evidence of a Physical Change/Interaction Change in Shape Size State Texture

Chemical Properties Chemical property: a property that can only be observed by changing the identity of the substance; the substance cannot be resorted to its original state

Evidence of a Chemical Change/Interaction Evidence of Chemical Change: Color change Temperature change New odor Formation of a gas Rust