Energy - (Thermochemistry)

Learning Targets:

• Be able to describe the Kinetic Molecular Theory
• Be able to explain the Maxwell Boltzman distribution
• Be able to provide molecular descriptions of solids, liquids, gases and vapor pressure
• Be able to use specific heat to determine energy changes due to temperature changes
• Be able to use enthalpy to describe energy changes of reactions
• Be able to distinguish between thermal energy and energy of interactions
• Be able to use enthalpy to describe phase changes
• Be able to calculate energy with multiple phases
• Be able to interpret phase change diagrams
• Be able to use Hess’ law to find enthalpy of a reaction
• Be able to use standard enthalpy of formation to find enthalpy of a reaction
• Be able to use bond energy to find enthalpy of a reaction

Outline:
Reaction Puzzle 1:            Dye diffusion in hot vs cold water
Reaction Puzzle 2:            Rate of temperature change of water vs ethanol (or methanol)
Group learning:                 Calorimetry here
Lab practical:                    Predict temperature gain of cold water when combined with hot metal (Lab or simulation)
Lecture 1:                         Thermal Energy / Interaction Energy (slides)
Practice Problems            Homework here
Group Learning:               Bond Energy here and practice here
Reaction Puzzle 3:            Endothermic and exothermic rxns (Lab)
Lecture 2:                         Covalent Energy / Phase diagrams/Hess' law/heat of formation
                                             --- Same Slide pack as above Hess, Homework and additional practice
Infographic                         Student Investigation and Presentation (explanation here)
Confirmation experiment:  Experimental confirmation of Hess' law (Vernier Lab)
Practice                             Phase diagrams (here) and energy of phase changes (here)
Reaction Puzzle:               Explain freezing of water (Lab)
Culminating experiment:   Calorimetry (Lab)

Alternative assignments:
Reaction Puzzle 1:            Boundless
Reaction Puzzle 2:            ChemQuest - Specific Heat
Lab practical:                    SkillsPractice - Specific Heat
Reaction Puzzle 3:            Endo-Exo thermic worksheet
Lecture 1:                         no alternative - see slides
Reaction Puzzle 4:            ChemQuest - Energy and Changes in matter
Lecture 2:                         ChemQuest - Phase Diagrams 
                                       ChemQuest - Thermodynamics
Confirmation experiment:   ChemQuest - Hess' Law
Culminating experiment:    Fake data for lab

Homework

• Part 1 here
• Part 2 here

Text Resources

• Chapter 9 in OpenStax Chemistry Atoms First text chapter 9

Vocabulary:

• Kinetic energy
• Kinetic molecular theory
• Vaporization
• Evaporation
• Vapor pressure
• Boiling point
• Melting point
• Freezing point
• Sublimation
• Phase diagram
• Triple point
• Thermochemistry
• Chemical potential energy
• Heat
• System / surroundings
• Law of conservation of energy
• Endothermic
• Exothermic
• Heat capacity
• Specific heat
• Calorimetry
• Enthalpy
• Thermochemical equation
• Heat of reaction
• Heat of combustion
• Molar heat of fusion
• Molar heat of solidification (fusion)
• Molar heat of vaporization
• Molar heat of condensation
• Molar heat of solution
• Hess’ law
• Standard enthalpy of formation

Alternate Powerpoint:
     Chapter 13: section_1, section_2, section_3, section_4
     Chapter 17: section_1, section_2, section_3, section_4

Key Objectives: Unit 6

Chemistry - Wilbraham et al (Pearson 2012)
Chapters:
    17
Good Problems to Master:
    17: 42,45,46,49,50,52,55,59,61,62,63,65,66,69,71,73,78,79,82,83,84