2024 Rates of Reactions

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What are some signs that a chemical reaction has taken place?

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Signs of a chemical reaction include: change in shape, bubbles of gas appearing, color change, temperature change, and formation of a precipitate.

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This reaction is an exothermic reaction because it releases energy.

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If a chemical reaction is exothermic, what happens to the temperature?

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The temperature increases during an exothermic reaction.

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What is a coefficient in a chemical equation?

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A coefficient is a number written in front of a chemical formula that indicates the number of molecules or moles of that substance.

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How does adding a catalyst affect activation energy?

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Adding a catalyst lowers the activation energy required for a reaction to occur.

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What is activation energy?

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Activation energy is the minimum amount of energy needed for a chemical reaction to begin.

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What is the difference between an endothermic and exothermic reaction?

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An endothermic reaction absorbs energy, while an exothermic reaction releases energy.

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What is a chemical reaction?

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A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

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What is a product in a chemical reaction?

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A product is a substance that is formed as a result of a chemical reaction.

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What is a reactant in a chemical reaction?

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A reactant is a substance that undergoes change during a chemical reaction.