AP Chemistryeasymcq1 pt
Which process is endothermic?
A.NH₄NO₃ dissolving in water (instant cold pack)
B.Condensation of steam
C.Freezing water
D.Neutralizing HCl with NaOH
Explanation
Core Concept
Cold packs absorb heat from the surroundings, so the dissolution is endothermic (ΔH > 0). The temperature drop is direct evidence.
Correct Answer
ANH₄NO₃ dissolving in water (instant cold pack)
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