Chemical Reactions of Matter

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What is a chemical reaction?

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A process where substances (reactants) undergo a transformation to form new substances (products).

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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 exothermic reaction?

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A chemical reaction that releases energy in the form of heat or light.

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What is an endothermic reaction?

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A chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

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What are reactants in a chemical reaction?

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The starting substances that undergo change during a chemical reaction.

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What are products in a chemical reaction?

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The new substances formed as a result of a chemical reaction.

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What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

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What is a synthesis reaction?

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A type of chemical reaction where two or more simple substances combine to form a more complex substance.

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What is a decomposition reaction?

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A type of chemical reaction where a complex substance breaks down into simpler substances.

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What is a single displacement reaction?

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A chemical reaction where one element replaces another element in a compound.