Physics
Grade-9
Easy
Question
Water is heated on a burner. What happens to the kinetic energy of its particles? What does it lead to?
- Increases, increase in volume
- Decreases, decrease in volume
- Increases, decrease in volume
- Decreases, increase in volume
Hint:
- Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
The correct answer is: Increases, increase in volume
- Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
- Gases have high kinetic energy
- The particles have higher kinetic energy which changes liquid water to gaseous water vapor.
- And due to evaporation its volume decreases
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