1. Specific Heat Capacity
Notes
These areas have extra notes to help you.
Make notes as we go along, always including these post-its

2. Objectives Objectives BRONZE SILVER GOLD
Identify what we mean by ‘heating up’ and ‘cooling down’.
SILVER
Describe which materials heat and cool the quickest.
GOLD
Define specific heat capacity and use the relevant equation to calculate the value of ‘c’ for different materials.

3. It’s 1pm on the beach, why does the sand feel
Engage
Groups of four
Discuss
SEA
Pick a leader
Hints
What energy is applied?
How do they differ?
Can we assume any control factor?
It’s 1pm on the beach, why does the sand feel
hotter than the sea?
SAND

4. SPECIFIC HEAT CAPACITY
Starter Explored
Groups of four
How much a substance’s temperature rises due to an energy input is related to a feature known as…
SPECIFIC HEAT CAPACITY
Why does the sand feel
hotter than the sea?
Discuss
SAND
SEA
Pick a leader
Is the energy applied the same?
Well the mass of one is bigger…..assume it’s not!
So if it’s not down to the mass….
Hints
What energy is applied?
How do they differ?
Can we assume any control factor?

5. Explore
Mass
If a substance is being heated, what factors would affect how its temperature changes?
Energy
Input
Substance!
(SHC)
Remember
When we controlled the mass of the sand and water (and the energy in) the only thing that affected the temp was the substances themselves!

6. a.k.a the end temperature – the start temperature
Explore ∆Q
Change in energy m
Mass
SO….The specific heat capacity of an object (or substance) is the energy needed to raise the temperature of 1kg of that object by 1K! This must be WITHOUT a change in state
∆Q=mc ∆T ∆T
Change in temperature
Extension
Work out the units for ‘c’!
Task
Write down the units for ΔQ, m and ΔT
"∆T"
ΔQ= J ΔT= K ( or ˚C) m= Kg
When we use ∆T
what we mean is
∆T2−∆T1
a.k.a the end temperature – the start temperature
J= kg x ? x K
So the value of ? must contain J and counteract K and Kg
3. So ‘c’ is measured in Jkg-1K-1

7. Progress Checker
Identify
Calculate the energy require to raise the temperature of 500 g of water from 20K to 100K (3 marks)
Convert
Rearrange
Values of c
Al: 900
Concrete: 850
Copper: 360
Lead: 130
Oil: 2100
Water: 4200

8. Progress Checker
Identify
Q: Calculate the energy require to raise the temperature of 5000 g of water from 20K to 100K (3 marks) A: 1)
2) m = 5kg, ∆T=80K,c= 4200 Jkg-1K-1
3) so… 5 x 80 x 4200= 1.7 x 106 J
∆Q=mc ∆T
Convert
Practice time: You have 15mins to work on the questions on the hand out. If you finish early, create a question of your own!
Swap – Different Colour Pen- Peer Assess
Rearrange
Values of c
Al: 900
Concrete: 850
Copper: 360
Lead: 130
Oil: 2100
Water: 4200

9. Theoretical Practical
In pairs
How can we measure the specific heat capacity of a liquid?
Discuss
Task 1: Identify what variables we would need to control and which ones we would measure
Task 2: Suggest equipment that we could use. Go to another group and discover their ideas.
Compare
Task 3: Draw the diagram of the set up you would use. Compare it with the one shown to you
Equation hints
What equation would work out the energy in?
Don’t forget you have to consider the energy is shared between the liquid AND the calirometer!
Task 4: CHALLENGE: What would be the equation? Extension: rearrange to get ‘c’ of the liquid

10. Wider Context Exam Question
Change in energy
Explain how knowing the specific heat capacity of liquids and metals is useful for the design of the following objects
6 marks m
Mass ∆T
Change in temperature
This solar panel is for heating water..

11. ∆Q m ∆T Wider Context Exam Question
Change in energy
Explain how knowing the specific heat capacity of liquids and metals is useful for the design of the following objects
6 marks
Definition of specific heat capacity
Can calculate the energy needed to heat water to a certain temperature
This helps to calibrate the shower
Different metals will have different specific heat capacities
In a solar panel, the energy from the sun is transferred to the water to heat it
Allows you to calculate the time needed to change the temp of water for different metals
Hence allows you to determine the optimum metals to construct the pipes used.
Copper is the commonly used metal m
Mass ∆T
Change in temperature
Peer assess
Swap and mark
Add missing information
WWW
EBI

12. Objectives Objectives BRONZE SILVER GOLD Red
Identify what we mean by ‘heating up’ and ‘cooling down’.
Amber
SILVER
Describe which materials heat and cool the quickest.
Green
Reflection
GOLD
Define specific heat capacity and use the relevant equation to calculate the value of ‘c’ for different materials.
What energy is applied?
How do they differ?
Can we assume any control factor?

13. Objectives Independent Study
Write half a page explaining how you would identify the specific heat capacity of a metal block
Hints: Choose an example metal, what factors will you need to control and measure, what calculations would you do after?