7.2 Chemical Reactions & Energy

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What is a chemical reaction?

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A process where new substances are produced from one or more molecules of old substances.

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What are reactants?

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The original substances you start with before a chemical reaction occurs.

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What is an exothermic reaction?

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A reaction where energy flows from the reaction system to the surroundings, meaning heat exits the system.

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What is a tradeoff?

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When one decision directly affects another decision, and you can’t do both things.

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What are products in a chemical reaction?

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The new substances that are produced from 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; it is conserved.

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What is an endothermic reaction?

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A reaction that absorbs energy from its surroundings, causing a decrease in temperature.

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What is a catalyst?

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A substance that increases the rate of a chemical reaction without being consumed in the process.

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What is a chemical bond?

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The force that holds atoms together in a molecule.

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What is solubility?

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The ability of a substance to dissolve in a solvent.