Physical and Chemical Properties and Changes Review

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What is density?

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Density is the mass of an object divided by its volume, typically expressed in grams per milliliter (g/mL).

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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 its identity, such as color, density, and melting point.

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What is a chemical property?

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A chemical property is a characteristic of a substance that describes its ability to undergo a specific chemical change, such as reactivity with acids or flammability.

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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, such as melting or freezing.

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What is a chemical change?

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A chemical change is a process that involves the transformation of one or more substances into different substances, indicated by changes such as color change, gas production, or temperature change.

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What happens during sublimation?

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Sublimation is the phase change in which a solid turns directly into a gas without passing through the liquid phase, such as dry ice turning into carbon dioxide gas.

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What is evaporation?

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Evaporation is the process by which liquid turns into vapor at temperatures below its boiling point, often occurring at the surface of the liquid.

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What is condensation?

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Condensation is the phase change in which a gas turns into a liquid, often seen when water vapor cools and forms droplets on a surface.

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What is melting?

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Melting is the phase change in which a solid turns into a liquid when heat is added, such as ice melting into water.

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What is freezing?

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Freezing is the phase change in which a liquid turns into a solid when heat is removed, such as water freezing into ice.