1. Heating up
• Relate a rise in the temperature of a body to an increase in internal energy
• Show an understanding of the term thermal
capacity
Supplement
• Describe an experiment to measure the
specific heat capacity of a substance

2. Aims That heat energy is measured in joules
That adding heat energy can raise the temperature of a material
That materials have a Specific Heat Capacity
To use these ideas to solve problems.

3. To do Watch or carry out the experiment
Whilst you are waiting for the clock to reach 300s Start drawing the diagram.
Record your result (What is the temperature change?)
Make a prediction ‘I think that if I use twice as much energy (VIt) the temperature rise for 1kg of water will be ………….oC

4. Do other substances need as much energy as water?
Copy the title
Watch or Carry out the experiment
Record your result (s)
Compare your result(s) with the temperature rise for water
Read p116

5. Conclusion
The same amount of energy will raise the ……………. of different substances by ……………. Amounts.
e.g. the temperature rise for aluminium is about ……. Times the rise for water for the …………….. Amount of energy put in.
The amount of energy needed to raise the temperature of 1kg of a substance by 1 oC is called the ……………… …………. ……………

6. More to do Answer q1 -3 on p 117 Show all working like this
Write down the formula -
energy transferred = mass x specific heat capacity x temperature rise
Rearrange –
specific heat capacity = energy transferred /mass x temperature rise
Substitute in values
specific heat capacity = 10000/(5x10)
State answer
specific heat capacity =500 J/kgK
Check units and calculation

7. Homework

8. Heat Summary When an object is heated the internal energy goes up
The unit of energy is Joules (J)
Energy needed to change = specific heat × mass × change in temperature capacity temperature

9. Chapter 7 : Measuring Heat
The unit of energy is the ______ 1kJ means one ________ ______ 1MJ means one ________ ______
The specific heat capacity of a substance is the amount of ________ needed to raise one ________ of the substance through __ °C. The unit of specific heat capacity is ________

10. Chapter 7 : Measuring Heat
Answers
Chapter 7 : Measuring Heat
The unit of energy is the ______ 1kJ means one ________ ______ 1MJ means one ________ ______
The specific heat capacity of a substance is the amount of ________ needed to raise one ________ of the substance through __ °C. The unit of specific heat capacity is ________
Joule (J).
thousand joules.
million joules.
energy
kilogram 1
J per kg per °C