Reversible and Irreversible changes Wk4

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What is a reversible change?

Back

A reversible change is a change that can be undone or reversed, returning the substance to its original state. Example: Melting ice can be frozen back into ice.

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What is an irreversible change?

Back

An irreversible change is a change that cannot be undone, and the substance cannot return to its original state. Example: Burning wood.

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What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent, such as water. Example: Sugar dissolving in water.

Front

What is an example of a substance that dissolves in water?

Back

Sugar is an example of a substance that dissolves in water.

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What happens during oxidation?

Back

Oxidation is a chemical reaction where a substance combines with oxygen, often resulting in rusting or burning. Example: Rusting of iron.

Front

What is an example of oxidation?

Back

Rusting of iron (formation of iron oxide) is an example of oxidation.

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What is melting?

Back

Melting is the process of a solid turning into a liquid when heated. Example: Melting butter.

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What is an example of a reversible change?

Back

Melting butter is an example of a reversible change.

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What is an example of an irreversible change?

Back

Lighting a match is an example of an irreversible change.

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.