1 / 17

Changes in State

Changes in State. Vapor Pressure observation definition temperature dependence Changes in State enthalpies heating curves Phase Diagrams special points examples. Vapor Pressure. Dfns. pres. of vapor present above a (l) or (s)

jadyn
Download Presentation

Changes in State

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Changes in State • Vapor Pressure • observation • definition • temperature dependence • Changes in State • enthalpies • heating curves • Phase Diagrams • special points • examples

  2. Vapor Pressure • Dfns. • pres. of vapor present above a (l) or (s) • DHvap energy to convert 1 mole liquid to gas at 1 atm • Eq. Vapor Pressure • rate of evaporation = rate of condensation • Measuring Pvapor • Hg column Pvapor = Patm – PHg column

  3. Temperature Dependence

  4. Temperature Dependence R = 8.3145 J/mol•K T = temperature (K) C = const. related to DS

  5. Changes in State: Heating Curve

  6. Changes in State: Heating Curve condensation evaporation

  7. Changes in State: Heating Curve condensation evaporation freezing melting

  8. Changes in State: Heating Curve condensation evaporation enthalpy of vaporization freezing melting

  9. Changes in State: Heating Curve condensation evaporation enthalpy of fusion enthalpy of vaporization freezing melting

  10. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm 1 (0.118 atm) (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  11. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm • 2: T at P = 0.01 atm 1 (0.118 atm) 2 (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  12. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm • 2: T at P = 0.01 atm • 3: T at P = 0.118 atm 1 3 (0.118 atm) 2 (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  13. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm • 2: T at P = 0.01 atm • 3: T at P = 0.118 atm • 4: T at P = 1 atm 4 1 3 (0.118 atm) 2 (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  14. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm • 2: T at P = 0.01 atm • 3: T at P = 0.118 atm • 4: T at P = 1 atm • 5: P at T = 100. C 4 1 3 (0.118 atm) 2 5 (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  15. Phase Diagrams Iodine • Represents the phases of a material at various T and P in a closed system • Experiments • 1: T at P = 1 atm • 2: T at P = 0.01 atm • 3: T at P = 0.118 atm • 4: T at P = 1 atm • 5: P at T = 100. C • 6: P at T = 150. C 4 1 3 (0.118 atm) 2 5 6 (546 C) http://cwx.prenhall.com/petrucci/medialib/ media_portfolio/text_images/FG13_18.JPG

  16. Phase Diagrams: Water

  17. Phase Diagrams: Water

More Related