1. Phase Diagram

2. The state of matter of a substance is dependent on 2 variables
The state of matter of a substance is dependent on 2 variables. - Temperature - Pressure

3. You can use a Phase Diagram to determine the state of matter of a substance, depending on it’s temperature and pressure.

4. Typical Phase Diagram

5. Important Parts of the Phase Diagram

6. Melting Curve – shows the pressure and temperature that a solid becomes a liquid and visa versa.

7. Vapor Curve – shows the pressure and temperature that a liquid becomes a gas and visa versa.

8. Sublimation Curve – shows the pressure and temperature that a solid becomes a gas and visa versa.

9. Triple Point – is the temperature and pressure where all 3 phases of matter can coexist.

10. Critical Point – occurs under conditions at which no phase boundaries exist.

11. Phases Diagram for H2O At 1 atm H2O melts at 0oC and boils at 100oC.

12. What state of matter would the following substance be under the following conditions?

13. Temp. = - 20oC Press. = 100atm

14. Temp. = -70oC Press. = 1000atm

15. Temp. = 0oC Press. = 1atm

16. What phase change would occur under the following conditions?

17. Temp. = -20 Press. = 1 atm to 100 atm

18. Temp. = 10 Press. = 100 atm to 10,000 atm

19. Temp. = -70 Press. = 1 atm to 10 atm

20. Temp. = -20 Press. = 5000 atm to 1 atm

21. Temp. = -100 to -60 Press. = 1 atm

22. Temp. = -60 to -40 Press. = 100 atm

23. Temp. = -50 to 0 Press. = 10 atm

24. On the bottom of your notes answer the following questions.

25. What state of matter would you have at a temp
What state of matter would you have at a temp. of 200oC and a pressure of 0.50 atm?

26. What state of matter would you have at a temp
What state of matter would you have at a temp. of 400oC and a pressure of 1.50 atm?

27. What state of matter would you have at a temp
What state of matter would you have at a temp. of 100oC and a pressure of 2.0 atm?

28. What phase change would occur if the temp
What phase change would occur if the temp. was a constant 300oC and the pressure decreased from 1.25 to 0.5 atm?

29. What phase change would occur if the pressure was a constant 1
What phase change would occur if the pressure was a constant 1.25 atm and the temp. increased from 0 to 800oC?

30. What temperature and pressure can all 3 phases exist at once?

31. Use the information you just got to complete the ‘Phase Diagram Practice Sheet 1213’ . Due tomorrow (10 pts.) Individual Work!!

32. Once finished with the worksheet: - Complete the Gizmo worksheet and quiz - Complete the Kinetic Theory and Endo/Exo. Practice Sheet and put it in the appropriate dropbox.