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Lesson 9
Chapter 3 Energy — Section 2 & 3
This lesson
Some practical info
Understanding a calorimeter
Exercises specific heat capacity
Double glass
Heat transfer
Quality of insulation
1 / 17
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Slide 1:
Tekstslide
Physics
Middelbare school
vwo
Leerjaar 3
In deze les zitten
17 slides
, met
tekstslides
.
Lesduur is:
45 min
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Chapter 3 Energy — Section 2 & 3
This lesson
Some practical info
Understanding a calorimeter
Exercises specific heat capacity
Double glass
Heat transfer
Quality of insulation
Slide 1 - Tekstslide
Learning goals
At the end of this lesson you can:
Explain how a caloriemeter works and what it is used for
Rearrange the formula for specific heat
Explain how double glass works
Name the three forms of heat transfer and examples for each
Do calculations on quality of insulation
Slide 2 - Tekstslide
Practical info
The practical will take place the first week after the carnavals break.
For this you will have to study chapter 3 section 1 to 4.
If we have time left this period, we will also do a poster assignment.
If we don't have enough time, we will do the poster assignment next period.
Slide 3 - Tekstslide
Section 2 – Heating
Slide 4 - Tekstslide
Understanding
a calorimeter
What components do you notice?
What is their function?
What is the purpose of a calorie meter?
Slide 5 - Tekstslide
Understanding
a calorimeter
A calorimeter is used to measure the amount of heat required to raise the temperature of a certain amount of water
Slide 6 - Tekstslide
Specific heat capacity
Q: Heat in joules (J)
c: The specific heat capacity of a s substance (J/(g•ºC)
m: The mass of a substance in grams (g)
ΔT = T
end
- T
start : The temperature difference (º
C)
Q
=
c
⋅
m
⋅
Δ
T
The property of a substance of how easily it heats up.
Slide 7 - Tekstslide
Slide 8 - Tekstslide
Section 3 — Inulsation
Slide 9 - Tekstslide
Understanding double glass
Slide 10 - Tekstslide
Heat transfer
Three forms of heat transfer:
Conduction
Convection
Radiation
Slide 11 - Tekstslide
Exercise — Heat transfer
Three forms of heat transfer:
Conduction
Convection
Radiation
Come up with three examples of for each form of heat transfer
Slide 12 - Tekstslide
Exercise — Heat transfer
Three forms of heat transfer:
Conduction
Convection
Radiation
Come up with three examples of for each form of heat transfer
Slide 13 - Tekstslide
Conduction
A radiator
Holding a hot cup of tea
A pan on a stove
Convection
Warm water flowing through a tap
A cold breeze in the summer
Steam coming of boiling water
Radiation
A campfire
The sun
Electric heating
Slide 14 - Tekstslide
Quality of insulation
Q: Heat in joules (J)
U: the quality of insulation of the wall (W/m
2
•ºC)
A: The surface area of the wall (m
2
)
ΔT = T
end
- T
start : The temperature difference (º
C)
Q
=
U
⋅
A
⋅
Δ
T
The property of a material of it's quality of insulation
Slide 15 - Tekstslide
Practice
Work on exercise 8 and 9 in pairs of two
If you're done with those — start with exercise 1, 2, 4, 5 and 6
Slide 16 - Tekstslide
Learning goals
At the end of this lesson you can:
Explain how a caloriemeter works and what it is used for
Rearrange the formula for specific heat
Explain how double glass works
Name the three forms of heat transfer and examples for each
Do calculations on quality of insulation
Slide 17 - Tekstslide
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