PH-769
Melting, boiling and evaporation
Physics · Secondary 3 · Medium · Melting, boiling and evaporation
A puddle of water on the floor slowly evaporates at room temperature. Which statement best explains why the water cools as it evaporates?
- All molecules in the water lose energy before leaving the surface.
- Slow-moving molecules escape, leaving faster ones behind.
- Fast-moving molecules escape, leaving slower ones behind.
- Evaporation increases the average kinetic energy of the remaining molecules.
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