Multiple Choice
Given a phase change graph for a pure substance, at which temperature does the boiling point occur?
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13. Liquids, Solids & Intermolecular Forces
Phase Diagrams
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Which process describes the direct change of a substance from the gas phase to the solid phase without passing through the liquid phase?
A
Evaporation
B
Deposition
C
Freezing
D
Sublimation
Verified step by step guidance1
Understand the phases of matter: solid, liquid, and gas, and the common phase changes between them.
Recall that evaporation is the process where a liquid changes to a gas, so it does not describe gas to solid.
Freezing is the process where a liquid changes to a solid, so it also does not describe gas to solid.
Sublimation is the process where a solid changes directly to a gas without becoming liquid first.
Deposition is the reverse of sublimation, where a gas changes directly to a solid without passing through the liquid phase, which matches the description in the problem.
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