What is evaporation?

Evaporation & Condensation - Oxford AQA IGCSE Physics

Flashcard
•
Physics
•
9th Grade
•
Hard
Eleanor Jane Fearon
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6 questions
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1.
FLASHCARD QUESTION
Front
Back
Evaporation is a change in the state of a liquid to a gas. It has a cooling effect and occurs at any temperature, unlike boiling which only occurs at the boiling point.
2.
FLASHCARD QUESTION
Front
How does evaporation differ from boiling?
Back
Evaporation happens at any temperature and only affects particles at the surface of the liquid, while boiling occurs at the boiling point and affects particles throughout the liquid
3.
FLASHCARD QUESTION
Front
What happens to the molecules during evaporation?
Back
More energetic molecules near the surface of the liquid escape, reducing the average kinetic energy of the liquid and causing it to cool down.
4.
FLASHCARD QUESTION
Front
How does temperature affect evaporation?
Back
Increased temperature increases the kinetic energy of molecules, making them more likely to overcome intermolecular forces and escape, thus increasing the rate of evaporation.
5.
FLASHCARD QUESTION
Front
What role does surface area play in evaporation?
Back
A larger surface area allows more molecules to escape, leading to a higher rate of evaporation.
6.
FLASHCARD QUESTION
Front
How does air movement affect evaporation?
Back
Air movement carries away evaporated water vapor, drying the air and allowing more water molecules to escape, thus increasing the rate of evaporation.
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