Chemical and Physical Properties

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What is a physical property?

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A characteristic of a substance that can be observed or measured without changing its identity, such as color, odor, melting point, and boiling point.

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What is a chemical property?

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A characteristic of a substance that describes its ability to change into different substances, such as flammability, reactivity with acids, and oxidation states.

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What is a physical change?

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice or dissolving sugar in water.

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What is a chemical change?

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A change that results in the formation of new chemical substances, indicated by color change, gas production, or temperature change, such as rusting or burning.

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Example of a physical property: Color

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The color of a substance, such as blue powder, is a physical property that can be observed without changing the substance.

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Example of a chemical property: Flammability

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The ability of a substance to catch fire and burn, such as the flammability of a candle wick.

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What happens during rusting?

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Rusting is a chemical change where iron reacts with oxygen and moisture to form iron oxide (rust), altering the chemical composition.

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What is the difference between physical and chemical changes?

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Physical changes do not alter the chemical composition of a substance, while chemical changes result in new substances being formed.

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What is an example of a physical change?

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Melting ice is a physical change because it changes from solid to liquid without changing its chemical identity.

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What is an example of a chemical change?

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Spoiling food is a chemical change as it involves the breakdown of food substances into new compounds.