Triple Point Plot
melting
Pressure (atm)
freezing
liquid
solid
vaporization
condensation
0.6
sublimation
gas
deposition
2.6
Temperature (oC)
LeMay Jr, Beall, Robblee, Brower, Chemistry Connections to Our Changing World , 1996, page 488
Triple Point
22,058
Critical point
Critical
pressure
Normal
melting
point
Normal
boiling
point
Pressure (KPa)
101.3
Solid
Vapor
Liquid
0.61
Triple point
0
100
0.016
Temperature (oC)
373.99
Critical
temperature
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
Eafter = Ebefore
2 H2
+
+
O2


2 H2O
+
+
energy
WOOF!
Law of Conservation of Energy
2 H2
Eafter = Ebefore
O2  2 H2O
+
+

+
energy
+
WOOF!
heat, light, sound
ENERGY
KEstopper
PEproducts
PEreactants
C2H2 + O2
CO2 + H2O
Law of Conservation of Energy
Eafter = Ebefore
2C2H2 + 5O2  4 CO2 + 2H2O + energy
heat, light, sound
ENERGY
KEstopper
PEproducts
PEreactants
C2H2 + O2
C2H2 + O2
Heating Curves
140
120
Gas - KE 
Temperature (oC)
100
Boiling - PE 
80
60
40
20
0
-20
Liquid - KE 
Melting - PE 
-40
-60
-80
Solid - KE 
-100
Time
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
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
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
Phase Diagrams
 Show
the phases of a substance at
different temps and pressures.
Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem
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)
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)