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Phase Diagram

Phase Diagram. The state of matter of a substance is dependent on 2 variables. - Temperature - Pressure. You can use a Phase Diagram to determine the state of matter of a substance, depending on it’s temperature and pressure. Typical Phase Diagram. Important Parts of the Phase Diagram.

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Phase Diagram

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  1. Phase Diagram

  2. 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 H2OAt 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 atmto 100 atm

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

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

  20. Temp. = -20 Press. = 5000 atmto 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. of 200oC and a pressure of 0.50 atm?

  26. 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. of 100oC and a pressure of 2.0 atm?

  28. 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 1.25 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.

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