Chemical and Physical Properties

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What is a chemical property?

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A characteristic of a substance that becomes evident during a chemical reaction; it describes the substance's ability to undergo changes that transform it into different substances.

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What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing the substance's chemical identity, such as color, melting point, and density.

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What happens during a chemical change?

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A substance transforms into one or more different substances, often accompanied by energy changes, gas production, or color changes.

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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, freezing, or dissolving.

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Example of a chemical property?

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The ability of iron to rust when exposed to oxygen and moisture.

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Example of a physical property?

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The boiling point of water, which is 100°C at standard atmospheric pressure.

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What is conductivity in terms of physical properties?

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The ability of a substance to conduct electricity, which is a physical property that can be tested by connecting it to a battery.

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What is the significance of melting point?

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It is a physical property that indicates the temperature at which a solid becomes a liquid.

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What is the difference between a chemical change and a physical change?

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A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.

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What is an example of a physical change?

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Separating sand from gravel, which involves no change in the chemical composition of either material.