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Evaporation in Everyday Life with Examples
- 1. METHODS OF SEPERATION INEVERYDAY LIFE
- 2. METHODS OF SEPERATION IN EVERYDAYLIFE •Conten t •Definition •Examples •Activity •Procedure •Summary
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- 4. Evaporatio n Definition Evaporation is theprocess where a liquid, like water, changes into a gas or vapor at a temperature below its boiling point
- 5. Evaporation In EverydayLife Surface process: It happens on the surface of the liquid, unlike boiling, which occurs throughout the entire liquid. Triggered by heat: Energy, often from heat, causes the liquid molecules to move faster and escape into the atmosphere. Happens at any temperature: It can happen at any temperature, although it happens faster when it is warmer. Below boiling point: The liquid turns into a gas without needing to reach its boiling point.
- 6. Evaporatio n Examples Drying clotheson a line Sweating on your skin The gradual drying of water in a pot left outside.
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- 8. Activity Heating a Chinadish containing a salt solution
- 9. Heating a Chinadish containing a salt solution Aim To demonstrate the process of evaporation and show that salt is dissolved in water, which can be recovered after the water is removed.
- 10. Heating a China dishcontaining a salt solution Required Material • Salt solution (salt mixed in water) • China dish (or an evaporating dish) • Tripod stand • Wire gauze • Bunsen burner (or another heat source) • Water (for preparation/safety) • Tongs (optional, for handling the hot dish)
- 11. Heating a Chinadish containing a salt solution Procedure Step 1 Preparation: Pour some salt solution into the China dish.
- 12. Heating a China dishcontaining a salt solution Procedure Step 2 Heating: Gently heat the China dish over the heat source.
- 13. Heating a China dishcontaining a salt solution Procedure Step 3 Observation: Watch as the water starts to boil and turn into steam/vapor.
- 14. Heating a Chinadish containing a salt solution Procedure Step 4 • Cooling: Once all the water is gone, turn off the heat and let the dish cool down.
- 15. Heating a Chinadish containing a salt solution Observation • The water level in the China dish decreased over time. Eventually, all the water disappeared as vapor. A white solid substance was left behind in the dish. Result: By touching the substance, you can confirm it is the salt.
- 16. Heating a China dishcontaining a salt solution Summary • Heating a salt solution separates the salt (solid) from the water (liquid) through Evaporation, leaving only the solid salt crystals behind . • This is a common way to recover salt from saltwater.