1. Do Now
When the bell rings
After the bell (2 min)
In your seat:
With pen/pencil
With Notebook
With Handout
Silent and ready for Do Now
Read and respond to the following quote: “By failing to prepare, you are preparing to fail” - Benjamin Franklin
Still needs Do Now

2. Agenda  Do Now (5 min) Warm Up: (15 min)
Notes: Specific Heat (40 min)
Independent Practice(15 min)
Exit Slip (5 min)
Closeout (2 min) 

3. Warm up
Heat energy can be transferred in 3 ways, identify the 3 ways.

4. Warm up

5. Unit: Thermodynamics Topic: Specific Heat
Objective:
Explain and calculate specific heat

6. Why does aluminum foil cool faster than a cooking tray?
Guiding question

7. Vocabulary and Definitions
Specific Heat Capacity: the amount of heat (energy) required to raise the temperature of one gram of a substance by one degree Celsius
Insulator: a material that does not allow the transfer of energy through it
Conductor: a material through which heat can pass
Vocabulary and Definitions

8. KP #1: Specific Heat Main Points:
A property of a substance that describes how easy or difficult it is to heat (or cool) a substance
Every material has its own specific heat
Is a constant (it remains the same)
A low specific heat means heat is conducted through an object quickly
KP #1: Specific Heat

9. KP #2: Insulators & Conductors
change heat easily
Low Specific Heat
Require little energy to change temp
Do NOT change heat easily
High Specific Heat
Require LOTS of energy to change temp
KP #2: Insulators & Conductors

10. KP #2 Conductors Insulators Material C Water 4184 Plastic Foam 2010
Air, 200 K
1650
Aluminum
897
Iron
449
Brass
375
Insulators
Conductors

11. KP #3: Comparing Specific Heat
Low Specific Heat
High Specific Heat
Less heat needed to get hot
Gets hot faster
Cools off faster
Ex: Aluminum Foil
More heat needed to get hot
Takes longer to get hot
Takes longer to cool off
Ex: Water
KP #3: Comparing Specific Heat

12. C.F.U.
Material
Specific Heat Capacity
Water
4184
Plastic Foam
2010
Air, 200 K
1650
Aluminum
897
Iron
449
Brass
375
1. Which substance is the easiest (requires the least amount of energy) to heat up?
2. Which substance is the hardest to heat up?
3. Based on what you know, which substance would have a greater temperature increase if the same amount of energy were added to each?

13. KP #4: Solving Specific Heat Problems
Q = heat (joules-J)
m = mass (kg)
C = specific heat (J/kg °C)
DT = change in temp (°C) OR
Q = Cm(Tf – Ti)
Final Temperature
Starting
Temperature

14. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
If the specific heat of methanol is 251 J/kg˚C, how many Joules of heat are needed to raise the temp of kg of methanol from 18˚C to 33˚C?

15. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
The heat capacity of lead is 130 J/kg˚C. How much heat (in J) is required to raise the temperature of kg of lead from 22˚C to 37˚C?

16. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
A kg sample of water was cooled from 50˚C to 10˚C. How much heat was lost? The specific heat of water is 4,184 J/kg˚C.

17. Independent Practice How What 15 minutes
C: 0 – 1, only on task conversation
H: Raise hand, move on to next question until I am available
A: Completing questions
M: In clusters. 3 Hall passes.
P: Answering questions on notebook paper, using notes, head up, discussing in groups, using boxes
15 minutes
Complete practice on reverse side of notes

18. Exit Slip What? (5 min) How?
C – No talking
H – Raise hand
A – Taking exit slip
M – In seat
P – Completing exit slip without notes and turning in
The specific heat of SrCl2 is 0.5 J/gC. How much heat is needed to change the temperature of a 20 gram sample of SrCl2 from 10˚C to 20˚C?

19. Closing Don’t forget to stretch One thing you learned today
Complete the 6 Specific Heat questions (due on Thursday)

20. Do Now Answer the riddle: In your seat: When the bell rings
After the bell (2 min)
Answer the riddle:
In a one-story pink house, there was a pink person, a pink cat, a pink fish, a pink computer, a pink chair, a pink table, a pink telephone, a pink shower– everything was pink! What color were the stairs?
In your seat:
With pen/pencil
With Notebook
With Handout
Silent and ready for Do Now
Still needs Do Now

21. Agenda  Do Now (5 min) Warm Up: (30 min)
Independent Practice: Specific Heat (20 min)
The Relay: Endo/Exo (15 min)
Independent Practice: Endo/Exo (15 min)
Exit Slip (7 min)
Closeout (2 min)

22. Unit: Thermodynamics Topic: Specific Heat
Objectives:
Use the formula Q = C•m•∆T to solve for any missing variable
Identify any process as endothermic or exothermic

23. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is J/g°C?
Would this process be considered endothermic or exothermic?

24. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
100.0 g of 4.0°C water is heated until its temperature is 37°C. If the specific heat of water is 4.18 J/g°C, calculate the amount of heat energy needed to cause this rise in temperature.
Would this process be considered endothermic or exothermic?

25. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
A g piece of iron absorbs joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.
Would this process be considered endothermic or exothermic?

26. KP #4: Solving Specific Heat Problems
Q =
C =
M =
DT =
Calculate the specific heat capacity of a piece of wood if g of the wood absorbs 67,500 joules of heat, and its temperature changes from 32°C to 57°C.
Would this process be considered endothermic or exothermic?

27. Independent Practice How What 20 minutes Complete practice questions
C: 0 – 1, only on task conversation
H: Raise hand, move on to next question until I am available
A: Completing questions
M: In clusters. 3 Hall passes.
P: Answering questions on notebook paper, using notes, head up, discussing in groups, using boxes
20 minutes
10 min front
10 min back
Complete practice questions
Answers under warm up

28. The Relay With your small groups Answer a series of 6 questions
Everyone starts with #1, check your answer and move on to #2 if correct

29. Independent Practice How What 15 minutes
C: 0 – 1, only on task conversation
H: Raise hand, move on to next question until I am available
A: Completing questions
M: In clusters. 3 Hall passes.
P: Answering questions on notebook paper, using notes, head up, discussing in groups, using boxes
15 minutes
Complete practice on reverse side of notes

30. Exit Slip What? (5 min) How?
C – No talking
H – Raise hand
A – Taking exit slip
M – In seat
P – Completing exit slip without notes and turning in
What mass of water will change its temperature by 3 0C when 525 J of heat is added to it? The specific heat of water is J/g 0C
Would this process be considered exothermic or endothermic?

31. Closing Don’t forget to stretch One thing you learned today
Complete the 6 Specific Heat questions