10
QuizMultiple Choice

Heat — Quiz

Question 10 • Physical Science

Which event is endothermic?

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

Explanation

An endothermic change absorbs heat from its surroundings. Melting ice requires heat to break some of the attractions holding water molecules in the solid structure, so it is endothermic. Water vapor condensing, burning a match, and propane combustion all release heat.

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