Physical & Chemical Changes/Endo & Exo Flashcard

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into different substances with new chemical properties.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is evidence of a physical change?

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Evidence of a physical change includes changes in shape, size, or state of matter, such as melting or freezing.

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What is evidence of a chemical change?

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Evidence of a chemical change includes color change, gas formation, light production, and the formation of a precipitate.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat or light.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What happens to energy in an exothermic reaction?

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In an exothermic reaction, energy is released into the surroundings.

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What happens to energy in an endothermic reaction?

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In an endothermic reaction, energy is absorbed from the surroundings.

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What is the difference between physical and chemical changes?

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Physical changes do not alter the chemical composition of a substance, while chemical changes result in the formation of new substances.