1. Vapor pressure FEBRUARY 10, 2015

2. SCIENCE STARTER DO THE SCIENCE STARTER TAKE 3 MINUTES YOU ARE SEATED AND SILENT ALSO TAKE OUT YOUR JOURNAL

3. Upcoming assessment First assessment this Friday.

4. AIM Which substance has a higher evaporation rate?

5. VOCABULARY Vapor pressure Atmopheric pressure Evaporation rate

6. Vapor pressure The equilibrium pressure of a vapor above its liquid

7. Atmospheric pressure Force per unit area exerted on a surface by the weight of air above the surface in the atmosphere

8. Evaporation rate Rate at which a material will change from liquid to vapor

9. Boiling point Temperature boils at what temperature What is the pressure on the water? 1 atm or 101.3kPa

10. Factors affecting evaporation Two factors affect rate of evaporation Temperature Surface area

11. Pressure vs temperature As temperature increases Rate of evaporation increase Pressure exerted by the gases increase when vapor pressure = atmospheric pressure = boiling point The higher the vapor pressure, the higher the rate of evaporation

13. AIM PROMPT Which substance has a higher evaporation rate Use the RACE format (A paragraph of at least 3 sentences). Use evidence from class discussion and notes.