Triple Point Plot - PowerPoint PPT Presentation

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Triple Point Plot

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  1. melting freezing vaporization condensation 0.6 sublimation deposition 2.6 Triple Point Plot liquid solid Pressure (atm) gas Temperature (oC) LeMay Jr, Beall, Robblee, Brower, Chemistry Connections to Our Changing World , 1996, page 488

  2. Triple Point 22,058 Critical point Critical pressure Normal melting point Normal boiling point 101.3 Pressure (KPa) Solid Vapor Liquid 0.61 Triple point 100 0.016 373.99 0 Critical temperature Temperature (oC)

  3. Objectives - Matter • Explain why mass is used as a measure of the quantity of matter. • Describe the characteristics of elements, compounds, and mixtures. • Solve density problems by applying an understanding of the concepts of density. • Distinguish between physical and chemical properties and physical and chemical changes. • Demonstrate an understanding of the law of conservation of mass by applying it to a chemical reaction.

  4. Objectives - Energy • Identify various forms of energy. • Describe changes in energy that take place during a chemical reaction. • Distinguish between heat and temperature. • Solve calorimetry problems. • Describe the interactions that occur between electrostatic charges.

  5. Law of Conservation of Energy Eafter = Ebefore 2 H2 + O22 H2O + energy • Energy Changes +  + WOOF!

  6. heat, light, sound ENERGY KEstopper PEproducts PEreactants C2H2 + O2 CO2 + H2O Law of Conservation of Energy Eafter = Ebefore 2 H2 + O22 H2O + energy +  + WOOF! • Energy Changes

  7. heat, light, sound ENERGY KEstopper PEproducts PEreactants C2H2 + O2 C2H2 + O2 Law of Conservation of Energy Eafter = Ebefore 2C2H2 + 5O2 4 CO2 + 2H2O + energy • Energy Changes

  8. Gas - KE  Boiling - PE  Liquid - KE  Melting - PE  Solid - KE  Heating Curves 140 120 100 80 60 40 Temperature (oC) 20 0 -20 -40 -60 -80 -100 Time

  9. Heating Curves • Temperature Change • change in KE (molecular motion) • depends on heat capacity • Heat Capacity • energy required to raise the temp of 1 gram of a substance by 1°C • “Volcano” clip - water has a very high heat capacity Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  10. Heating Curves • Phase Change • change in PE (molecular arrangement) • temp remains constant • Heat of Fusion (Hfus) • energy required to melt 1 gram of a substance at its m.p. Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  11. Heating Curves • Heat of Vaporization (Hvap) • energy required to boil 1 gram of a substance at its b.p. • usually larger than Hfus…why? • EX: sweating, steam burns, the drinking bird Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  12. Phase Diagrams • Show the phases of a substance at different temps and pressures. Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  13. Resources - Matter and Energy Objectives - matter and energy Objectives - measurement Objectives - phases of matter Worksheet - vocabulary Activity - chromatography Worksheet - percentage composition Outline - causes of change - calorimetry Worksheet - properties Worksheet - calorimetry problems 1 Worksheet - density problems Worksheet - calorimetry problems 2 Activity - density blocks Worksheet - heat energy problems Lab - golf ball lab Worksheet - conversion factors Worksheet - classifying matter Worksheet - atoms, mass, and the mole Article - buckeyball & questions (video) activity - mole pattern Article - buried in ice Outline(general)

  14. Resources - Matter and Energy Objectives - matter and energy Objectives - measurement Objectives - phases of matter Worksheet - vocabulary Activity - chromatography Worksheet - percentage composition Outline - causes of change - calorimetry Worksheet - properties Worksheet - calorimetry problems 1 Worksheet - density problems Worksheet - calorimetry problems 2 Activity - density blocks Worksheet - heat energy problems Lab - golf ball lab Worksheet - conversion factors Worksheet - classifying matter Worksheet - atoms, mass, and the mole Article - buckeyball & questions (video) activity - mole pattern Article - buried in ice Outline(general)