PD6 - MRMS MP2: 2025: Exothermic/Endothermic Flashcard

Front

What is an endothermic reaction?

Back

An endothermic reaction is a process that absorbs heat from its surroundings, resulting in a decrease in temperature. Examples include melting ice and evaporation.

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What is an exothermic reaction?

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An exothermic reaction is a process that releases heat to its surroundings, resulting in an increase in temperature. Examples include combustion and rusting.

Front

What happens during evaporation?

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During evaporation, a liquid absorbs heat and changes into a gas. This process is endothermic.

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What is an example of an exothermic process?

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Fireworks exploding is an example of an exothermic process, as it releases heat and light.

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What is the significance of temperature change in endothermic reactions?

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In endothermic reactions, the temperature of the surroundings decreases because heat is absorbed by the system.

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What is the significance of temperature change in exothermic reactions?

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In exothermic reactions, the temperature of the surroundings increases because heat is released by the system.

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What is sublimation?

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Sublimation is the process where a solid changes directly into a gas without becoming a liquid first. An example is dry ice sublimating.

Front

What is the role of heat in chemical reactions?

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Heat can either be absorbed or released during chemical reactions, determining whether the reaction is endothermic or exothermic.

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What is an example of an endothermic change in cooking?

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Baking cupcakes is an endothermic change because the oven absorbs heat, causing the temperature to decrease.

Front

What is rusting?

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Rusting is an exothermic process where iron reacts with oxygen and moisture, releasing heat.