2
QuizMultiple Choice

Heat

Question 2 • *25-26 KCS18 Chemistry IC

Which event is endothermic?

Answer
A
the burning of a match
B
the change of water vapor to a liquid
C
the combustion of propane gas
D
the melting of ice

Explanation

Melting ice is endothermic because it absorbs heat from its surroundings to change from a solid into a liquid. Burning a match and combusting propane release heat, while water vapor condensing into liquid also releases heat. Therefore, the endothermic event is the melting of ice.

AI-written and checked against the verified answer.

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