Chemical/Physical Properties & Changes

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include crumpling paper, melting ice, and dissolving sugar in water.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the chemical composition of the substance. Examples include burning wood, rusting iron, and baking a cake.

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Is crumpling paper a physical or chemical change?

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Crumpling paper is a physical change.

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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. Examples include color, odor, melting point, and boiling point.

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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. Examples include flammability and reactivity.

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Is odor a chemical or physical property?

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Odor is a physical property.

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What is flammability?

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Flammability is a chemical property that describes a substance's ability to burn in the presence of oxygen.

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What happens during a physical change?

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During a physical change, the form of a substance changes, but its chemical composition remains the same.

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What happens during a chemical change?

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During a chemical change, the substances involved undergo a transformation that results in the formation of new substances with different properties.

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Can a physical change be reversed?

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Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.