Presentation Transcript
Slide 1:Bellwork 2/10/09 How does it feel when you sweet?
Have you ever gotten a steam burn?
How does it feel when liquid wax from a candle drips on your skin?
Have you ever touched dry ice? How does that feel?
Changes of State :Changes of State Section 4 Changes of State Chapter 10
Endothermic vs. Exothermic :Endothermic vs. Exothermic Whenever a substance changes from one phase (solid, liquid, or gas) to another energy is either absorbed or released.
An exothermic phase change releases energy.
An endothermic phase change absorbs energy.
We’ll take another look at that diagram.
Slide 4:Chapter 10
Slide 5:Phase Diagram for Water Section 4 Changes of State Chapter 10
Slide 6:Phase Diagram for Water Section 4 Changes of State Chapter 10
Slide 7:Phase Diagram for Water Section 4 Changes of State Chapter 10
Phase Diagram for CO2 :Phase Diagram for CO2 Section 4 Changes of State Chapter 10
Slide 9:Chapter 10 Phase diagram for UF6 (14.7 psia = 1 atm)
Slide 10:Chapter 10 Who thinks they can read a graph?
Slide 11:Chapter 10