5.0 Chemical Reactions

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What is a chemical reaction?

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

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What is the Law of Conservation of Mass?

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A principle stating that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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What is a balanced chemical equation?

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An equation where the number of atoms for each element is the same on both sides, indicating that mass is conserved.

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What is an exothermic reaction?

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A chemical reaction that releases energy, usually in the form of heat.

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What is an endothermic reaction?

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A chemical reaction that absorbs energy from its surroundings.

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What is a synthesis reaction?

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A type of reaction where two or more reactants combine to form a single product.

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What is a decomposition reaction?

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A reaction where a single compound breaks down into two or more simpler products.

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What is a combustion reaction?

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A reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat.

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What is a single replacement reaction?

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

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What is a double replacement reaction?

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A reaction where the anions and cations of two different compounds exchange places to form two new compounds.