Types of Reactions & Reaction Rates

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reaction rate

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the speed at which a chemical reaction occurs

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catalyst

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A substance that increases reaction rate by lowering the activation energy of a reaction

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endothermic

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a chemical reaction that absorbs heat

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exothermic

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a chemical reaction in which energy is released, or given off in the form of heat

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activation energy

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the minimum amount of energy required to start a chemical reaction

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enzyme

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A catalyst that speeds up chemical reactions in living cells

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inhibitor

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A substance that slows, or even stops, a chemical reaction

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synthesis reaction

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two or more substances combine to form a compound

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decomposition reaction

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a single compound breaks down into two or more substances

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single replacement reaction

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the atoms of one element replace the atoms of another element in a compound