Multiple Choice
Which type of change occurs when water evaporates from a surface?
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1. Intro to General Chemistry
Physical & Chemical Changes
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Which change of state occurs when a gas loses energy?
A
Melting
B
Condensation
C
Sublimation
D
Evaporation
Verified step by step guidance1
Understand that a change of state (phase change) involves the transition of a substance from one physical state (solid, liquid, gas) to another.
Recall that when a gas loses energy, it means the particles are losing kinetic energy and moving closer together.
Identify the phase change where a gas turns into a liquid, which is called condensation.
Note that melting is the change from solid to liquid, sublimation is solid to gas, and evaporation is liquid to gas, so these do not apply when a gas loses energy.
Therefore, the correct change of state when a gas loses energy is condensation.
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