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Year 9 Chemical Reactions Properties, Equations, And Energy Changes Practice Test

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Which is an everyday endothermic reaction?
Correct Answer:
Instant cold packs
Explanation:
Endothermic reactions absorb energy from their surroundings. An everyday example is an instant cold pack: when activated, the contents dissolve, and the dissolution pulls heat from the surrounding pack and your skin, making it feel cold. The other options involve releasing heat: burning fuels and hand warmers mainly produce warmth through exothermic reactions, and condensing steam releases heat as it changes from gas to liquid. So the cold-pack is the everyday endothermic example.

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