Chemical Properties

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What is a chemical change?

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A process where substances combine or break apart to form new substances with different properties.

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What is an example of a chemical change?

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Burning wood, which produces ash and smoke.

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What is a physical change?

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A change that affects one or more physical properties of a substance without altering its chemical composition.

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What is an example of a physical change?

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Melting ice into water.

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What indicates a chemical change has occurred?

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Signs include color change, gas production (bubbles), temperature change, and formation of a precipitate.

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What happens to the identity of a substance during a chemical change?

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The identity of the substance changes as new substances are formed.

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What is the difference between chemical and physical properties?

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Chemical properties describe a substance's ability to undergo chemical changes, while physical properties can be observed without changing the substance's identity.

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What is an example of a chemical property?

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Flammability, which describes how easily a substance can catch fire.

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What does it mean when a new substance forms during a chemical change?

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It means that the original substances have reacted to create one or more different substances with distinct properties.

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What is the role of energy in chemical changes?

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Energy is either absorbed or released during a chemical change, affecting the temperature and state of the substances involved.