Chemical Changes

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances with different properties.

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What indicates a chemical change?

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A temperature change is often an indicator of a chemical change.

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What does the Law of Conservation of Matter state?

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The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction.

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What happens to mass during a chemical change?

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The mass stays the same during a chemical change, according to the law of conservation of mass.

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What are some examples of chemical changes?

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Examples of chemical changes include color change, burning, and rusting.

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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 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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Tearing a piece of paper is an example of a physical change.

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What happens to temperature during an exothermic reaction?

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In an exothermic reaction, the temperature of the surroundings increases as heat is released.

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What happens to temperature during an endothermic reaction?

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In an endothermic reaction, the temperature of the surroundings decreases as heat is absorbed.

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What is rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.