1. Kelvin, Celsius, Fahrenheit Kelvin, Celsius, Fahrenheit
Transfer of thermal energy from one object to another; goes from hot to cold

2. Second; particles are moving faster so they have more KE
Average kinetic energy of particles in an object due to their random motion
faster
Kinetic energy
temperature
Second; particles are moving faster so they have more KE

3. Increase in temperature increases faster Farther apart
Thermal expansion
Increase in the volume
Increase in temperature
increases
faster
Farther apart
As temperature changes, expands and contracts
Less cracks if in different segments

4. SI unit for temperature is _____________.
Other scales are _____________ and ____________.
Kelvin
Celsius
Fahrenheit

5. 8.
Specific heat
heat
temperature 1g
1 °
lower
less
metals
low
high

6. Q = m c ΔT ΔT = Tf-Ti 0.2kg 4,184 Specific heat heat mass Temp change
Q =0.2x4184x55
=46024
Q =46,024 J
ΔT= = 55
Q = ?

7. (watch your signs– don’t worry too much about units)
Q = 3780 J
100 9
4.2
Q = J /g°C
-3780
(watch your signs– don’t worry too much about units) 55 65

8. calorimeter Thermal energy lost absorbed
910
c = 0.14 J/g°C 50
130
ΔT = 211°C
2637.5
ΔT = 211°C = Tf – Ti 25
0.50
ΔT = 211°C = Tf – 25
Tf = 236°C

9. Practice on pages 12-13
We will finish the notes afterward!

10. conduction

11. Convection
liquid
gas

12. Energy is always conserved.
Radiation
electromagnetic
Energy is always conserved.
Thermal energy flows from cold to hot ONLY when work is done.
Absolute zero cannot be reached.

13. Give an example of conduction.
How do we use convection?
What is radiation? Is it always harmful?

14. Heating curve - WATER condensation vapor 100˚C - evaporation liquid
melting
0˚C -
freezing
solid