7
QuizMultiple Choice

Phase Changes — Quiz

Question 7 • Chemistry

Which example involves a phase change in which heat energy is released by the substance?

Answer
A
freezing ice cream
B
watching frost disappear into air
C
melting ice under sunlight
D
cooking a pot of soup

Explanation

When a liquid freezes and becomes a solid, it releases heat energy to its surroundings. Freezing ice cream is the example of this phase change. Melting ice and cooking soup require heat, while frost disappearing into air is sublimation, which also absorbs heat.

AI-written and checked against the verified answer.

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