Which of the following is the best example of water changing from a liquid to a gas?

• A. Freezing water to form ice cubes
• B. Condensing steam on a cold surface to form liquid water
• C. Boiling water on a stove to produce steam
• D. Melting ice to produce liquid water

Answer: (C)

Verified step by step guidance

1. Identify the phase change process described in the problem: changing water from a liquid to a gas involves vaporization.
2. Recall that vaporization can occur in two main ways: evaporation (surface molecules escape into gas phase) and boiling (rapid vaporization throughout the liquid).
3. Analyze each option to determine which describes liquid water turning into gas:
4. - Freezing water to form ice cubes is liquid to solid (freezing).
5. - Condensing steam on a cold surface to form liquid water is gas to liquid (condensation).
6. - Boiling water on a stove to produce steam is liquid to gas (boiling/vaporization).
7. - Melting ice to produce liquid water is solid to liquid (melting).
8. Therefore, the best example of water changing from liquid to gas is boiling water on a stove to produce steam.