Evaporation
Temperature: 25°C
Molecules Escaped: 0
Boiling
Temperature: 100°C
Bubbles Formed: 0
Parameters
Current Boiling Point: 100°C
Pressure affects boiling point
Energy required to convert liquid to gas
Evaporation vs Boiling Comparison
| Feature | Evaporation | Boiling |
|---|---|---|
| Location | Surface only | Surface + Internal |
| Temperature | Any temperature | At boiling point |
| Intensity | Gradual | Violent |
| Bubbles | None | Present |
| Energy Source | Ambient | Continuous heating |
Applications
Sweating
Body cooling through evaporation
Cooking
Boiling water for food preparation
Distillation
Separating liquid mixtures
Drying
Evaporation-based processes
Key Concepts
Kinetic Theory:
High-energy molecules escape from surface
Vapor Pressure:
Equals atmospheric pressure at boiling point
Latent Heat:
Energy absorbed during phase change without temperature change