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1.5 Evaporation

Explore how liquids transform into vapor below their boiling point and discover the factors that affect this fascinating process

Evaporation Process

Particles with high kinetic energy escape from the liquid surface

Temperature: 25°C
Surface Area: Normal
Wind Speed: Low
Humidity: 50%
Rate: Slow
Adjust Factors Affecting Evaporation
🌡️ Temperature 25°C
📏 Surface Area Normal
💨 Wind Speed Low
💦 Humidity 50%
Real-Life Examples
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Wet Clothes
Clothes dry faster when spread out on a windy day
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Nail Polish Remover
Acetone evaporates quickly, cooling your skin
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Sweating
Body cools through perspiration evaporation
🏠
Roof Sprinkling
Water on hot surfaces cools through evaporation
🥤
Cold Glass
Water droplets form on cold glass surfaces
👕
Cotton in Summer
Cotton absorbs sweat for better cooling
Key Concepts
Evaporation is the change of liquid into vapor at any temperature below its boiling point
Surface particles with higher kinetic energy break away from attraction forces
Rate increases with: higher temperature, larger surface area, lower humidity, higher wind speed
Evaporation causes cooling as particles absorb energy from surroundings
The cooling effect has many practical applications in daily life