Multiple Choice
When water molecules change from solid to liquid, which of the following best describes what happens at the molecular level?
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13. Liquids, Solids & Intermolecular Forces
Phase Diagrams
Multiple Choice
Which of the following changes occurs as a solid is heated?
A
The solid undergoes deposition to form a gas.
B
The solid melts to form a liquid at its melting point.
C
The solid freezes to form a liquid.
D
The solid condenses to form a gas.
Verified step by step guidance1
Understand the phase changes of matter: solids, liquids, and gases can transform from one state to another through processes such as melting, freezing, condensation, vaporization, sublimation, and deposition.
Identify what happens when a solid is heated: heating a solid increases its temperature until it reaches its melting point, where it changes from a solid to a liquid. This process is called melting.
Recognize that deposition is the reverse of sublimation, where a gas turns directly into a solid without becoming a liquid, so deposition does not occur when heating a solid.
Note that freezing is the process where a liquid turns into a solid, which happens when cooling, not heating.
Understand that condensation is the process where a gas turns into a liquid, which also occurs upon cooling, not heating a solid.
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