Specific heat capacity

In this lesson we will be exploring the effects of adding energy to a system and its effect on temperature. We will look at how this leads to a definition of the property of specific heat capacity and how to calculate this for different materials.

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Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which energy store is increased when an object is heated?

Thermal Kinetic Elastic Gravitational Chemical

1/6

Q2.What is the power of a motor that transfers 550 J of energy in 11s?

0.02 W 5 W 50 W 6050 W

2/6

Q3.Which of these is a correct equation for percentage efficiency?

efficiency = (useful input power)/(total output power) * 100 efficiency = (useful input power)/(total output power) * 10 efficiency = (useful output )/(total input) * 10 efficiency = (useful output power)/(total input power) * 100

3/6

Q4.If a 0.75 efficient motor produces 150 W of useful power, what was the input power?

50 W 112.5 W 150 W 200 W

4/6

Q5.Which of these are ways in which a motor lifting a crate could transfer energy less usefully? (select 4)

Select four (4) boxes

heating the surroundings heating the cable transferred mechanically through sound transferred electrically transferred mechanically to the crate's GPE store transferred mechanically to the crate's thermal store transferred by radiation to the chemical store of the crate

5/6

Q6.Which material will have the lowest thermal conductivity?

Metal Wood Air Vacuum

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which energy store is increased when an object is heated?

Thermal Kinetic Elastic Gravitational Chemical

1/6

Q2.What is the power of a motor that transfers 550 J of energy in 11s?

0.02 W 5 W 50 W 6050 W

2/6

Q3.Which of these is a correct equation for percentage efficiency?

3/6

Q4.If a 0.75 efficient motor produces 150 W of useful power, what was the input power?

50 W 112.5 W 150 W 200 W

4/6

Q5.Which of these are ways in which a motor lifting a crate could transfer energy less usefully? (select 4)

Select four (4) boxes

5/6

Q6.Which material will have the lowest thermal conductivity?

Metal Wood Air Vacuum

6/6

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Specific heat capacity

This quiz will test your understanding of specific heat capacity and earlier lessons from this topic.

Q1.The definition of temperature is:

The average kinetic energy of molecules in the substance The sum of the kinetic energies of the molecules in the substance The product of the kinetic energies of the molecules in the substance The sum of the kinetic and potential energies of the molecules in the substance

1/7

Q2.Which will have more energy in its thermal store?

A sparkler at 3000 ᵒC A sofa at 30 ᵒC A pan full of water at 100 ᵒC A cruise ship at 20 ᵒC

2/7

Q3.Which of these is the correct definition of power?

How much energy is transferred The rate of energy transfer The time taken for energy to be transferred How much energy is transferred at once

3/7

Q4.What is the correct definition of specific heat capacity?

The energy required to increase temperature of a substance by 1 ᵒC The energy required to increase temperature of 1 kg of a substance by 1 ᵒC The energy required to heat a substances by 1 ᵒC The energy required to change state of 1 kg of a substance

4/7

Q5.How long would it take a 200 W motor to transfer 1000 J of energy?

5 s 50 s 0.2 s 0.02 s

5/7

Q6.Which will require the most energy to raise its temperature by 2 ᵒC?

Oil Water Aluminium Copper

6/7

Q7.How much energy is required to raise the temperature of 4 kg of water by 2 ᵒC? (c = 4200 J/kg ᵒC)

336 000 J 8 400 J 33 600 J 16 800 J

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Specific heat capacity

This quiz will test your understanding of specific heat capacity and earlier lessons from this topic.

Q1.The definition of temperature is:

1/7

Q2.Which will have more energy in its thermal store?

A sparkler at 3000 ᵒC A sofa at 30 ᵒC A pan full of water at 100 ᵒC A cruise ship at 20 ᵒC

2/7

Q3.Which of these is the correct definition of power?

How much energy is transferred The rate of energy transfer The time taken for energy to be transferred How much energy is transferred at once

3/7

Q4.What is the correct definition of specific heat capacity?

4/7

Q5.How long would it take a 200 W motor to transfer 1000 J of energy?

5 s 50 s 0.2 s 0.02 s

5/7

Q6.Which will require the most energy to raise its temperature by 2 ᵒC?

Oil Water Aluminium Copper

6/7

Q7.How much energy is required to raise the temperature of 4 kg of water by 2 ᵒC? (c = 4200 J/kg ᵒC)

336 000 J 8 400 J 33 600 J 16 800 J

7/7

Lesson summary: Specific heat capacity

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Specific heat capacity

Intro quiz - Recap from previous lesson

Intro quiz - Recap from previous lesson

Video

Worksheet

Specific heat capacity

Specific heat capacity

Lesson summary: Specific heat capacity

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Time to move!

The next lesson in: Energy is: Specific heat capacity required practical

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The next lesson in:
Energy
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Specific heat capacity required practical