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

Liquid VaporSolid Normal melting point Normal boiling point Temperature ( o C) Pressure (KPa) Triple point Triple Point Critical pressure Critical point Critical temperature ,058

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.

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.

Law of Conservation of Energy E after = E before 2 H 2 + O 2  2 H 2 O + energy  Energy Changes +  + WOOF!

Law of Conservation of Energy ENERGY CO 2 + H 2 OC 2 H 2 + O 2 PE reactants PE products KE stopper heat, light, sound E after = E before 2 H 2 + O 2  2 H 2 O + energy  Energy Changes +  + WOOF!

Law of Conservation of Energy ENERGY C 2 H 2 + O 2 PE reactants PE products KE stopper heat, light, sound E after = E before  Energy Changes 2C 2 H 2 + 5O 2  4 CO 2 + 2H 2 O + energy

Heating Curves Temperature ( o C) Time Melting - PE  Solid - KE  Liquid - KE  Boiling - PE  Gas - KE 

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

Heating Curves  Phase Change change in PE (molecular arrangement) temp remains constant  Heat of Fusion (  H fus ) energy required to melt 1 gram of a substance at its m.p. Courtesy Christy Johannesson

Heating Curves  Heat of Vaporization (  H vap ) energy required to boil 1 gram of a substance at its b.p. usually larger than  H fus …why?  EX: sweating, steam burns, the drinking bird Courtesy Christy Johannesson

Phase Diagrams  Show the phases of a substance at different temps and pressures. Courtesy Christy Johannesson

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

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