Multiple Choice
Which of the following statements best describes whether an atom of element X can absorb two photons and then emit one photon in the context of endothermic and exothermic reactions?
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8. Thermochemistry
Endothermic & Exothermic Reactions
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Which statement is true about endothermic and exothermic reactions?
A
Both endothermic and exothermic reactions release heat to the surroundings.
B
Both endothermic and exothermic reactions absorb heat from the surroundings.
C
Exothermic reactions absorb heat from the surroundings, while endothermic reactions release heat.
D
Endothermic reactions absorb heat from the surroundings, while exothermic reactions release heat.
Verified step by step guidance1
Understand the definitions of endothermic and exothermic reactions: Endothermic reactions absorb heat from the surroundings, causing the system to gain energy.
Recognize that exothermic reactions release heat to the surroundings, meaning the system loses energy to the environment.
Analyze the energy flow in both types of reactions: In endothermic reactions, heat flows into the system, while in exothermic reactions, heat flows out of the system.
Compare the given statements with these definitions to identify which correctly describes the heat exchange for both reaction types.
Conclude that the statement 'Endothermic reactions absorb heat from the surroundings, while exothermic reactions release heat' accurately reflects the nature of these reactions.
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