5
QuizMultiple Choice

Phase Changes

Question 5 • IA-Chemistry A Survey of Chemistry A

Consider the statement below.“When nitrogen is liquefied, heat is released.”Is this statement true or false?

Answer
A
It is false because nitrogen absorbs heat when it is liquefied.
B
It is false because nitrogen cannot absorb enough heat to liquefy.
C
It is true because heat is released when a gas changes to a liquid.
D
It is true because heat is released when a liquid changes to a gas.

Explanation

Liquefying nitrogen means changing it from a gas to a liquid. During condensation, particles lose energy, and heat is released to the surroundings. Therefore, the statement is true, as choice C says.

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