Physical and Chemical Properties

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What is a chemical property?

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A chemical property is 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?

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A physical property is 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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Give an example of a chemical property.

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An example of a chemical property is the ability of iron to rust when exposed to oxygen.

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Give an example of a physical property.

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An example of a physical property is the boiling point of water, which is 100 degrees Celsius at standard atmospheric pressure.

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What happens to silver when it tarnishes? Is this a physical or chemical change?

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When silver tarnishes, it reacts with sulfur compounds in the air to form silver sulfide, which is a chemical change.

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What does it mean for a substance to react with acid?

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When a substance reacts with acid, it indicates a chemical property, as it involves a chemical reaction that produces new substances.

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What is the significance of melting point in physical properties?

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The melting point is the temperature at which a solid becomes a liquid; it is a key physical property that helps identify substances.

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How can taste be considered a physical property?

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Taste is considered a physical property because it can be observed without changing the chemical composition of the substance.

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

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A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

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What does it mean for a substance to react with oxygen?

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When a substance reacts with oxygen, it indicates a chemical property, as it involves a chemical reaction that can produce new substances, such as combustion.

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