Triple Point Plot

1
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)
Vapor
Solid
Liquid
0.61
Triple point
100
0.016
0
373.99
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.

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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.

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Law of Conservation of Energy
Eafter Ebefore
2 H2 O2 ? 2 H2O energy

• Energy Changes

? WOOF!
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Law of Conservation of Energy
Eafter Ebefore
2 H2 O2 ? 2 H2O energy
? WOOF!

• Energy Changes

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Law of Conservation of Energy
Eafter Ebefore
2C2H2 5O2 ? 4 CO2 2H2O energy

• Energy Changes

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9
Heating Curves
140
120
100
80
60
40
Temperature (oC)
20
0
-20
-40
-60
-80
-100
Time
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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 1C
• Volcano clip -

water has a very high heat capacity
Courtesy Christy Johannesson www.nisd.net/communic
ationsarts/pages/chem
11
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/communic
ationsarts/pages/chem
12
Heating Curves

• Heat of Vaporization (?Hvap)
• energy required to boil 1 gram of a substance at
  its b.p.
• usually larger than ?Hfuswhy?

• EX sweating, steam burns, the drinking bird

Courtesy Christy Johannesson www.nisd.net/communic
ationsarts/pages/chem
13
Phase Diagrams

• Show the phases of a substance at different temps
  and pressures.

Courtesy Christy Johannesson www.nisd.net/communic
ationsarts/pages/chem
14
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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)
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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)