Chapter 2 Flashcard Review

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What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include cutting, melting, and dissolving.

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What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with new chemical properties. Examples include rusting, burning, and digestion.

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What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the environment, forming iron oxide (rust).

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What is an intensive property?

Back

An intensive property is a property that does not depend on the amount of substance present. Examples include density, color, and boiling point.

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What is an extensive property?

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An extensive property is a property that depends on the amount of substance present. Examples include mass, volume, and total energy.

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What happens during a chemical reaction?

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During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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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 is an example of a physical change?

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Cutting a wooden board is an example of a physical change.

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What is an example of a chemical change?

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Rusting of metal is an example of a chemical change.

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What is density?

Back

Density is an intensive property defined as mass per unit volume of a substance, often expressed in grams per cubic centimeter (g/cm³).