Multiple Choice
Which type of chemical reaction occurs when energy is absorbed from the surroundings during the process?
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8. Thermochemistry
Endothermic & Exothermic Reactions
Multiple Choice
Which type of reaction is indicated when a fire flares up upon the addition of water?
A
A neutralization reaction, because acids and bases react.
B
An endothermic reaction, because heat is absorbed from the surroundings.
C
A precipitation reaction, because a solid forms.
D
An exothermic reaction, because heat is released rapidly.
Verified step by step guidance1
Understand the context: When water is added and a fire flares up, it means heat is being released quickly into the surroundings.
Recall the definitions of reaction types: An exothermic reaction releases heat, while an endothermic reaction absorbs heat.
Analyze the options: Neutralization involves acid-base reactions but does not necessarily cause a fire or rapid heat release; precipitation involves solid formation, not heat release.
Connect the observation to the reaction type: The rapid release of heat causing a fire flare-up indicates an exothermic reaction.
Conclude that the reaction is exothermic because the heat released upon adding water causes the fire to flare up.
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