DO NOW
When the bell rings
In
your seat:
With
pen/pencil
With
Notebook
With
Handout
Silent
and ready
for Do Now
After the bell (2 min)
Read and respond to
the following quote:
“By failing to prepare,
you are preparing to
fail”
- Benjamin Franklin
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)
Heat
energy can be
transferred in 3 ways,
identify the 3 ways.
WARM UP
WARM UP
UNIT: THERMODYNAMICS
TOPIC: SPECIFIC HEAT
Objective:
Explain and calculate specific heat
Why
does aluminum foil cool
faster than a cooking tray?
GUIDING QUESTION
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:
pass
a material through which heat can
VOCABULARY AND
DEFINITIONS
Main
Points:
1.
A property of a substance
that describes how easy or
difficult it is to heat (or cool)
a substance
2.
Every material has its own
specific heat
3.
Is a constant (it remains the
same)
4.
A low specific heat means
heat is conducted through
an object quickly
KP #1:
SPECIFIC
HEAT
Conductors
 change
 Low
heat easily
Specific Heat
 Require
little energy to
change temp
Insulators
 Do
NOT change heat easily
 High
Specific Heat
 Require
LOTS of energy to
change temp
KP #2: INSULATORS &
CONDUCTORS
C
Water
4184
Plastic
Foam
Air, 200 K
2010
Aluminum
897
Iron
449
Brass
375
1650
Conductors
Insulators
KP #2
Material
Low Specific Heat
Less
heat needed to
get hot
Gets
hot faster
Cools
Ex:
off faster
Aluminum Foil
High Specific Heat
More
heat needed to
get hot
Takes
longer to get hot
Takes
longer to cool off
Ex:
Water
KP #3: COMPARING
SPECIFIC HEAT
C.F.U.
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?
Material
Water
Specific Heat
Capacity
4184
Plastic Foam 2010
Air, 200 K
1650
Aluminum
897
Iron
449
Brass
375
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
OR
Q = Cm(Tf – Ti)
Final
Temperature
Q = heat (joules-J)
m = mass (kg)
C = specific heat (J/kg C)
DT = change in temp (C)
Starting
Temperature
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
If
the specific heat of
methanol is 251 J/kg˚C,
how many Joules of heat
are needed to raise the
temp of 0.250 kg of
methanol from 18˚C to
33˚C?
Q=
C=
M=
DT =
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
The
heat capacity of lead
is 130 J/kg˚C. How much
heat (in J) is required to
raise the temperature of
0.015 kg of lead from 22˚C
to 37˚C?
Q=
C=
M=
DT =
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
Q=
A
0.625 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.
C=
M=
DT =
INDEPENDENT PRACTICE
What
How
 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
EXIT SLIP
How?
C
– No talking
H
– Raise hand
A
– Taking exit
slip
M
P
– In seat
– Completing
exit slip without
notes and
turning in
What? (5 min)
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?
CLOSING
Don’t forget
to stretch
 One
thing you learned
today
 Complete
the 6 Specific
Heat questions (due on
Thursday)
DO NOW
When the bell rings
In
your seat:
With
pen/pencil
With
Notebook
With
Handout
Silent
and ready
for Do Now
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?
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)
UNIT: THERMODYNAMICS
TOPIC: SPECIFIC HEAT
Objectives:
1.
Use the formula Q = C•m•∆T to solve for any
missing variable
2.
Identify any process as endothermic or
exothermic
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
 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
0.90 J/g°C?
 Would
this process be
considered endothermic or
exothermic?
Q=
C=
M=
DT =
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
 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?
Q=
C=
M=
DT =
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
Q=


A 15.75-g piece of iron absorbs 1086.75
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?
C=
M=
DT =
KP #4: SOLVING
SPECIFIC HEAT
PROBLEMS
 Calculate
the specific heat
capacity of a piece of wood if
1500.0 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?
Q=
C=
M=
DT =
INDEPENDENT PRACTICE
What
How
 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
questions
Answers
practice
under warm up
With
your small groups
Answer
a series of 6
questions
Everyone
starts with
#1, check your answer
and move on to #2 if
correct
THE RELAY
INDEPENDENT PRACTICE
What
How
 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
EXIT SLIP
What? (5 min)
How?
C
– No talking
H
– Raise hand
1.
A
– Taking exit
slip
M
P
– In seat
– Completing
exit slip without
notes and
turning in
2.
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
4.18 J/g 0C
Would this process be
considered exothermic
or endothermic?
CLOSING
Don’t forget
to stretch
 One
thing you learned
today
 Complete
the 6 Specific
Heat questions