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Agenda                  Bell Work
Notes: Intro to Thermal   •   What is the
 Energy                       difference between
                              a hot cup of coffee
                              and a cold cup of
Temperature Scale             coffee?
  Reseach

                          - List everything you
HW: Chp 9 pg 135-              can think of.
 136, 138-139, 144-
 147
•   What is the difference between a hot cup
    of coffee and a cold cup of coffee?

- List everything you can think of.
Intro to Thermal Energy

    December 3, 2012
Objectives
1. Explain the motion of molecules in the
   different states of matter


2. Understand the definition of thermal
   energy


3. Describe what happens in thermal
   equilibrium
Movement of atoms
• All matter is constantly moving

• Moving particles determines whether an
 object is solid, liquid, or gas
Kinetic Energy


• The warmer an object is the more kinetic
 energy it has
  = more thermal energy
Thermal Energy

• The total energy of all it’s atoms and
 molecules
Hot or Cold

• Temperature

• Thermometer measures temperature by
 expansion or contraction of a liquid


Eureka 20
Temperature
• Related to the random motion
 of atoms and molecules


• average kinetic energy of
 molecules
• Thermometers read their own temperature



• Energy flows between the thermometer
 and the object until they reach an equal
 temperature


• This equilibrium is called a Thermal
 equilibrium
• Who created the temperature
                 scale?
               • When was it created?
• Celsius      • How or why did they create it?
• Fahrenheit   • What is the temp of: (put them in
• Kelvin         order)
                 –   Liquid nitrogen
                 –   Body temp
                 –   Boiling water
                 –   Freezing water
                 –   Room temp
                 –   Absolute zero
               • What is the conversion to the
                 other two scales?
Flow of Thermal Energy

• From a warmer substance to a colder
 one


• HEAT – thermal energy in motion
What’s cold?

• The absence of thermal energy

• An object is cold because of the loss
 in thermal energy


• Eureka 21
Heat

• Measured in Joules

• 4.2 Joules of heat to change 1 gram
 of water 1 Celsius degree
c alorie

• Unit of heat used in the United States

• Amount of heat needed to change 1
 gram of water 1 Celsius degree


• 1 c alorie = 4.2 joules
• Energy ratings of food and fuels are
 measured by the energy released
 when they are burned


• Kilo calories = C alories we know on
 food packages (capitol C)
• To the Weight Watcher, the peanut
 contains 10 C alories


• To the physicist, it releases 10,000
 c alories of energy when burned or
 digested

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Ccp intro to thermal energy fall 2010

  • 1. Agenda Bell Work Notes: Intro to Thermal • What is the Energy difference between a hot cup of coffee and a cold cup of Temperature Scale coffee? Reseach - List everything you HW: Chp 9 pg 135- can think of. 136, 138-139, 144- 147
  • 2. What is the difference between a hot cup of coffee and a cold cup of coffee? - List everything you can think of.
  • 3. Intro to Thermal Energy December 3, 2012
  • 4. Objectives 1. Explain the motion of molecules in the different states of matter 2. Understand the definition of thermal energy 3. Describe what happens in thermal equilibrium
  • 5. Movement of atoms • All matter is constantly moving • Moving particles determines whether an object is solid, liquid, or gas
  • 6. Kinetic Energy • The warmer an object is the more kinetic energy it has = more thermal energy
  • 7. Thermal Energy • The total energy of all it’s atoms and molecules
  • 8. Hot or Cold • Temperature • Thermometer measures temperature by expansion or contraction of a liquid Eureka 20
  • 9. Temperature • Related to the random motion of atoms and molecules • average kinetic energy of molecules
  • 10. • Thermometers read their own temperature • Energy flows between the thermometer and the object until they reach an equal temperature • This equilibrium is called a Thermal equilibrium
  • 11. • Who created the temperature scale? • When was it created? • Celsius • How or why did they create it? • Fahrenheit • What is the temp of: (put them in • Kelvin order) – Liquid nitrogen – Body temp – Boiling water – Freezing water – Room temp – Absolute zero • What is the conversion to the other two scales?
  • 12. Flow of Thermal Energy • From a warmer substance to a colder one • HEAT – thermal energy in motion
  • 13. What’s cold? • The absence of thermal energy • An object is cold because of the loss in thermal energy • Eureka 21
  • 14. Heat • Measured in Joules • 4.2 Joules of heat to change 1 gram of water 1 Celsius degree
  • 15. c alorie • Unit of heat used in the United States • Amount of heat needed to change 1 gram of water 1 Celsius degree • 1 c alorie = 4.2 joules
  • 16. • Energy ratings of food and fuels are measured by the energy released when they are burned • Kilo calories = C alories we know on food packages (capitol C)
  • 17. • To the Weight Watcher, the peanut contains 10 C alories • To the physicist, it releases 10,000 c alories of energy when burned or digested