1. Today’s special
Semester I exam results (Review exam with partner at your table…how can you improve for semester II? Write three ideas down in your planner.)
Vocab 9
Notes
HW I due next time

2. Thermal energy
PAc.7: Explain the processes of phase change in terms of temperature, heat transfer, and particle arrangement.
PAa.1: Generate hypotheses on the basis of credible, accurate, and relevant sources of scientific information.
PAa.2: Use appropriate laboratory apparatuses, technology, and techniques safely and accurately when conducting a scientific investigation.
PAa.9: Use appropriate safety procedures when conducting investigations.

3. Be true to your work, your word, and your friend.
Henry David Thoreau
Fact: Stewardesses is the longest word typed with only the left hand.

4. Thermal energy
The total energy of all atoms and molecules in a substance

5. Temperature The average kinetic energy of a substance
Celsius scale, named after Swedish astronomer Anders Celsius ( )
Fahrenheit scale, named after German physicist Gabriel Fahrenheit ( )
Kelvin scale named after Lord Kelvin, British physicist

6. Absolute zero
The temperature, 0 K, at which molecules have lost all available kinetic energy

7. Heat
Thermal energy transferred from one substance to another due to temperature difference

8. Heat energy
A calorie is the amount of heat needed to change the temperature of 1 gram of water by 1 Celsius degree
1 calorie = 4.18 joules
Food calorie (C) is a kilocalorie

9. First law of thermodynamics
Whenever heat flows into or out of a system, the gain or loss of thermal energy equals the amount of heat transferred

10. Second law of thermodynamics
Heat never spontaneously flows from a cold substance to a hot substance

11. Third law of thermodynamics
No system can reach absolute zero

12. Liquid nitrogen
BOILING POINT: −196°C

13. Specific heat capacity
The quantity of heat required to change the temperature of a unit mass of the substance by 1 degree

14. Thermal expansion
Molecules in a hot substance vibrate faster and move farther apart

15. Expansion of water
Water is the only substance that expands as it freezes

16. Homework Chapter HW: pp. 148-150
I. Review questions2-20 even (due date: ____________)
II. Exercises 2-20 even; Problems 1-5 (due date: __________)

17. Today’s special HW check (vocab 9 + HW I) Q & A Finish a few notes
Lab: Mixing warm and cold water
Demos: Hands (hot water, cold water, warm water in between), Hot water/cold water with food dye, thermometer (measures its own temperature because it comes to equilibrium)

18. Today’s special Turn in labs on front table
Math problems & class work time
HW II due next
Lab: measure the heating power (Part 1)
Demos: metal ball and ring (passed through, doesn’t), Expansion of heated fluids (demo book), bi-metal strip, thermostat

19. Today’s special Lab: measure the heating power (Part II)
HW II check; Q & A
Review
Test next