Which of the following phase changes represents sublimation?

• A. Gas to solid
• B. Liquid to gas
• C. Solid to gas
• D. Solid to liquid

Answer: (C)

Verified step by step guidance

1. Understand the definition of sublimation: it is the phase change where a substance transitions directly from the solid phase to the gas phase without passing through the liquid phase.
2. Review each option and identify the phase change it describes:
3. - Gas to solid is called deposition.
4. - Liquid to gas is called vaporization or evaporation.
5. - Solid to liquid is called melting or fusion.
6. Recognize that the correct phase change for sublimation is 'Solid to gas' because it matches the definition exactly.